CARL DE SOUZA/AFP/Getty Images
Kenyan soldiers take cover after heavy gunfire near Westgate mall in Nairobi on September 23, 2013. Kenyan Defence troops remain inside the mall, in a standoff with Somali militants after they laid siege to the shopping centre shooting and throwing grenades as they entered. Somali Shebab militants on September 23 threatened to kill hostages they are holding in the Nairobi shopping mall as Kenyan troops move to end their siege.
CARL DE SOUZA/AFP/Getty Images
Smoke rises from the Westgate mall in Nairobi on September 23, 2013. Kenyan troops were locked in a fierce firefight with Somali militants inside an upmarket Nairobi shopping mall in a final push to end a siege that has left 43 dead and 200 wounded with an unknown number of hostages still being held. Somalia's Al Qaeda-inspired Shebab rebels said the carnage at the part Israeli-owned complex mall was in retaliation for Kenya's military intervention in Somalia, where African Union troops are battling the Islamists.
SIMON MAINA/AFP/Getty Images
A wounded woman is helped to safety after masked gunmen stormed an upmarket mall and sprayed gunfire on shoppers and staff, killing at least six on September 21, 2013 in Nairobi. The Gunmen have taken at least seven hostages, police and security guards told an AFP reporter at the scene.
An image grab taken from AFP TV shows a Kenyan woman coming out of an air vent where she was hiding during an attack by masked gunmen at a shopping mall in Nairobi on September 21, 2013. Masked attackers stormed the packed upmarket shopping mall in Nairobi, spraying gunfire and killing at least 30 people and wounding dozens more before holing themselves up in the complex.
TONY KARUMBA/AFP/Getty Images
A woman who had been held hostage is carried in shock by rescue personnel on September 21, 2013, after she was freed following a security operation at an upmarket shopping mall in Nairobi where suspected terrorrists engaged Kenyan security forces in a drawn out gun fight. Some 20 people have been killed and about 50 wounded Saturday in the initial attack by the gunmen the Kenya Red Cross said.
SIMON MAINA/AFP/Getty Images
Armed Kenyan policemen take cover outside the Westgate mall in Nairobi on September 23, 2013. Kenyan troops were locked in a fierce firefight with Somali militants inside an upmarket Nairobi shopping mall on September 22 in a final push to end a siege that has left at least 69 dead and 200 wounded with an unknown number of hostages still being held. Somalia's Al Qaeda-inspired Shebab rebels said the carnage at the part Israeli-owned complex mall was in retaliation for Kenya's military intervention in Somalia, where African Union troops are battling the Islamists.
Four thunderous explosions rattled Nairobi's upscale mall Monday, part of a battle between Kenyan troops and al-Qaida-linked terrorists. Top Kenyan officials said two hostage takers, part of "a multinational collection from all over the world," had been killed.
Kenya's interior minister 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.
Interior Minister Joseph Ole Lenku also revised the death toll to 62. Kenyan officials earlier said 59 people have died since the siege on Westgate Mall began on Saturday, while the Red Cross had put the toll at 68, then in a tweet lowered it to 62, saying some bodies had been counted twice.
Dark plumes of smoke rose from the mall for more than an hour after four large explosions rocked the upscale Westlands neighborhood. A person with knowledge of the rescue operation told The Associated Press that the smoke was rising up and out of a large skylight inside the mall's main department and grocery store, Nakumatt, where goods like mattresses may have been lit on fire.
Kenya Chief of Defense forces Gen. Julius Karangi said fighters from an array of nations participated in the attack claimed by al-Shabab, a Somali group allied with al-Qaida.
"We have an idea who these people are and they are clearly a multinational collection from all over the world," he said.
Karangi said Kenyan forces were in charge of all floors inside the mall, though terrorists could still be hiding inside. Earlier witness reports had indicated that a woman was among the estimated 10 to 15 attackers. Lenku said that instead some male attackers had dressed up like women.
The four explosions were followed by volleys of gunfire, then a thick, dark column of smoke that burned for roughly 90 minutes. Military and police helicopters and one plane circled over the Nairobi mall, giving the upscale neighborhood the feel of a war zone.
On Sunday Kenyan officials announced that "most" hostages had been rescued. But no numbers were given. Kenyan officials have never said how many hostages they thought the attackers had, but have said preserving the hostages' lives is a top priority, greatly complicating the final fight against the attackers.
Kenyans and foreigners were among those confirmed dead, including British, French, Canadians, Indians, a Ghanaian, a South African and a Chinese woman. The UK Foreign Office said Monday it has confirmed the deaths of four British nationals.
From neighboring Somalia, spokesman Sheik Ali Mohamud Rage for al-Shabab — the militant group that claimed responsibility for the attack — said in an audio file posted on a website that the hostage takers had been ordered to "take punitive action against the hostages" if force was used to try to rescue them.
At the Oshwal Centre next to the mall, the Red Cross was using a squat concrete structure that houses a Hindu temple as a triage center. Medical workers attended to at least two wounded Kenyan soldiers there on Monday.
Al-Shabab said on a Twitter feed, an account that unlike some others appears to be genuine, that the attackers had lots of ammunition. The feed said that Kenya's government would be responsible for any loss of hostages' lives.
A large military assault began on the mall shortly before sundown on Sunday, with one helicopter skimming very close to the roof of the shopping complex as a loud explosion rang out, far larger than any previous grenade blast or gunfire volley. Officials said the siege would soon end and said "most" hostages had been rescued and that officials controlled "most" of the mall. But on Monday the standoff remained.
As the crisis surpassed the 48-hour mark, video taken by someone inside the mall's main department store when the assault began emerged. The video showed frightened and unsure shoppers crouching as long and loud volleys of gunfire could be heard.
The al-Shabab extremists stormed the mall on Saturday from two sides, throwing grenades and firing on civilians.
Kenyan authorities said they would do their utmost to save hostages' lives, but no officials could say precisely how many people were being held captive. Kenya's Red Cross said in a statement, citing police, that 49 people had been reported missing. Officials did not make an explicit link but that number could give an indication of the number of people held captive.
Al-Shabab said the attack, targeting non-Muslims, was in retribution for Kenyan forces' 2011 push into neighboring Somalia.
Associated Press reporters Rodney Muhumuza, Ben Curtis and Jacob Kushner in Nairobi, Kenya and Abdi Guled in Mogadishu, Somalia contributed to this report.