The Islamist militant group behind a deadly terror attack on a shopping mall in the Kenyan capital of Nairobi said Tuesday that its fighters were still holding out despite claims by authorities that Kenyan security forces had regained control of the building.

The group al-Shabab's Twitter account, established Tuesday after previous accounts had been shut down, was quoted by Reuters as saying, "There are countless number of dead bodies still scattered inside the mall, and the Mujahideen are still holding their ground. #Westgate"

That was followed by a tweet that said, "The hostages who were being held by the Mujahideen inside #Westgate are still alive, looking quite disconcerted but, nevertheless, alive.''

Despite Kenyan government assurances of success on Twitter, another explosion and more gunfire could be heard coming from the mall at around 6:30 a.m. local time on Tuesday, Associated Press reporters at the scene said. Security forces carried a body out of the mall, which remained on fire, with flames and smoke visible.

A government official told The Associated Press Tuesday that Nairobi's city morgue is preparing for the arrival of a large number of bodies from the mall. Morgue employees were dressed in smocks early Tuesday, though no bodies had been delivered. A city resident whose brother is taking part in the military operation inside the mall told AP that there were many dead bodies still in the mall.

Both the government official and the Nairobi resident insisted their names not be used so they would not face retribution from government officials.

While the government announced Sunday that "most" hostages had been released, at least 10 were still being held by a band of attackers described as "a multinational collection from all over the world," a security expert with contacts inside the mall told The Associated Press. Al-Shabab, a group allied with Al Qaeda, has claimed responsibility for the attacks, which it has called retaliation for Kenya's involvement in a crackdown on Islamic militants in neighboring Somalia.

Meanwhile, Kenya's foreign minister claimed in a television interview Monday that two or three Americans and one Briton were among those behind the attack.

The foreign minister, Amina Mohamed, said in an interview with PBS' "NewsHour" program that the Americans were 18 to 19 years old, of Somali or Arab origin and lived "in Minnesota and one other place" in the U.S. The attacker from Britain was a woman who has "done this many times before," Mohamed said.

For their part, al-Shabab denied Mohamed's statement, telling Reuters that "Those who describe the attackers as Americans and British are people who do not know what is going on in Westgate building.''

Mohamed's statement fueled speculation in the British press that a 29-year-old woman named Samantha Lewthwaite was involved in the attacks. Lewthwaite, a native of Buckinghamshire who converted to Islam at age 15 and was believed by Western intelligence agencies to be in East Africa, is the widow of Germaine Lindsay, one of the perpetrators of the July 7, 2005 suicide attacks on London's transport system during the morning rush hour. British security sources contacted by Reuters said that Lewthwaite's involvement in the attack was possible, but cautioned that no definitive information had been received.

The FBI and U.S. intelligence officials are "aggressively" investigating whether or not Americans were among the militants who attacked the mall, a federal law enforcement source told Fox News.

FBI officials told Fox they cannot yet confirm or deny whether any of the assailants are or were Americans. "We just don't know yet. We're still trying to figure it out," said the source.

State Department spokeswoman Jen Psaki said Monday the department had "no definitive evidence of the nationalities or the identities" of the attackers.

White House spokesman Ben Rhodes said U.S. officials have seen "reports coming out of al-Shabab that indicate information along those lines," referring to possible involvement of Americans in the attack.

"But we have to run those to ground, of course," he said. "We do monitor very carefully and have for some time been concerned about efforts by al-Shabab to recruit Americans or U.S. persons to come to Somalia.

"This is an issue that has been tracked very closely by the U.S. government, and it's one that we'll be looking into in the days ahead."

There was no answer at the Kenyan Mission at the United Nations on Monday night.

Mohamed said Kenya needs to work with other governments to fight the increasing terrorist threat and "much more with the U.S and the U.K., because both the victims and the perpetrators came from Kenya, the United Kingdom and the United States. From the information we have, two or three Americans and so far I've heard of one Brit."

She added: "That just goes to underline the global nature of this war that we are fighting."

Sources tell Fox News that Kenyan security forces exchanged fire with what was believed to be 10 to 15 gunmen hiding on the top floor of the building for several hours Monday morning, neutralizing most of them. Kenya’s chief of defense forces says troops are in control of all floors inside the mall -- though he says terrorists could still be hiding inside.

Interior Minister Joseph Ole Lenku told the press that three militants died and more hostages were freed in the efforts to end the ongoing siege waged since Saturday by al-Shabab. Lenku said the evacuation of hostages has gone "very, very well” and that Kenyan officials are "very certain" that there are few if any hostages left in the building. The government has never said how many hostages they believe were being held.

Officials say at least 62 people were killed and 200 wounded in the weekend attack, while 63 were reported missing.

Four booming blasts shook the building Monday morning, sending plumes of thick smoke into the sky. The gunmen holed up inside the mall had caused the smoke by setting mattresses on fire in a supermarket as a decoy, according to a Reuters report.

By evening, Kenyan security officials claimed the upper hand.

"Taken control of all the floors. We're not here to feed the attackers with pastries but to finish and punish them," Police Inspector General David Kimaiyo said on Twitter.

Kenya's Interior Minister Joseph Ole Lenku said the evacuation of hostages had gone "very, very well" and that Kenyan officials were "very certain" that few if any hostages were left in the building.

But with the mall cordoned off and under heavy security it was not possible to independently verify the assertions. Similar claims of a quick resolution were made by Kenyan officials on Sunday and the siege continued. Authorities have also not provided any details on how many hostages were freed or how many still remain captive.

Three attackers were killed in the fighting Monday, Kenyan authorities said, and more than 10 suspects arrested. Eleven Kenyan soldiers were wounded in the running gun battles.

Somalia's al-Qaida-linked rebel group, al-Shabab, which claimed responsibility for the attack, said the hostage-takers were well-armed and ready to take on the Kenyan forces.

An al-Shabab spokesman, Sheik Ali Mohamud Rage, said in an audio file posted on a militant website that the attackers had been ordered to "take punitive action against the hostages" if force was used to try to rescue them.

The attackers have lots of ammunition, the militant group said in a Twitter feed, adding that Kenya's government would be responsible for any loss of hostages' lives.

A Western security official in Nairobi who insisted on not being named to share information about the rescue operation said the only reason the siege hadn't yet ended would be because hostages were still inside.

President Obama said the U.S. was providing all the cooperation possible to Kenya. “I want to express personally not only my condolences to President Kenyatta who lost two family members in the attack, but to the Kenyan people.We stand with them against this terrible outrage that’s occurred. We will provide them with whatever law enforcement support that is necessary,” Obama said during a meeting with Nigerian President Goodluck Jonathan in New York Monday.

The militants specifically targeted non-Muslims, and at least 18 foreigners were among the dead, including six Britons, as well as citizens from France, Canada, the Netherlands, Australia, Peru, India, Ghana, South Africa and China. Nearly 200 people were wounded, including five Americans.

The al-Shabab extremist Islamic terrorist force grew out of the anarchy that crippled Somalia after warlords ousted a longtime dictator in 1991. Its name means "The Youth" in Arabic, and it was a splinter youth wing of a weak Islamic Courts Union government created in 2006 to establish a fundamentalist Islamic state in the East African nation.

Al-Shabab is estimated to have several thousand fighters, including a few hundred foreign fighters. Some of the insurgents' foreign fighters are from the Middle East with experience in the Iraq and Afghanistan conflicts. Others are young, raw recruits from Somali communities in the United States and Europe.

The Associated Press contributed to this report.

http://www.foxnews.com/world/2013/09/24/kenya-official-says-several-americans-among-mall-attackers/

Mr. President do your job. Americans have been taking hostages by terrorists. Send in the units trained to eliminate this threat the Seals and Delta Force. To bad he is just a coward with his little red lines in his sand!

Each terrorist should be shot dead.

Without a trial or due process?! Careful with that dangerous talk; Republicans will want you impeached for that!

Hussein just puts em in a theme park and caters to em.

And liberals and demoncraps will drone you for threatening their allies, then deny or stall your healthcare should you live thru it

So the point is......?

more spin and slant!

Ok, sorry, give them a quikie trial, then bludgeon them to death.

I knew SOMEHOW this would be the presidents fault and it surprised me they terrorists weren't automatically democrats

When it is a life or death situation yes. If they are shooting up a place, hell yes.

Yup, because it IS his fault. Has has done nothing but EMBOLDEN Al Qaeda and the Taliban and other terrorists since taking office with his BS red lines that are constantly crossed then he backtracks like a little b%^&$. These monsters are walking all over us and getting away with it because of the coward in chief.

Shhh! The president doesn't acknowledge or use the word terrorist.

Oh please. Obama gets the Russians to do all our dirty work for us, simply by rattling the saber a bit, and that makes him weak?

President Obama got everything he wanted. Syria gave pledged to give up chemical weapons (that the day before he swore he didn't have) and will submit to inspections by Russia, who want to keep control of those same weapons so that they don't get into the hands of Chechen Extremists.

As far as "EMBOLDEN Al Qaeda" I seriously doubt going behind Pakistan's back to kill the #1 was a bit of a misstep in your mind? Drone strikes in Afghanistan and Pakistan until both countries practically cried is your idea of emboldening AQ? WTF do you mean?

Too silly for real.

Too silly for real.Until they are knockin on your door. Then it's too late..

No worries here but I am not a fearful gun toter so I wouldn't understand the paranoia there.

thats good..

Kenya has an assault weapons ban and hand guns are licensed by the government..

Another example of how well gun control works..

This mall episode is like an average saturday night in Chicago..

i guess you went to the bathroom during the news where barry is sending boat loads of weapons to the rebels, which are in fact the same terrorists we are at war with...(taliban, al quida, blah, blah blah)... or did you just rationalize that part too?

Hail, Rahm Emanuel!