White Widow terrorist claims undergoing forensic test

Forensic experts were trying ton confirm Tuesday rumors a British national nicknamed the White Widow was one of the perpetrators of Saturday's attack on a Kenyan mall.

"We cannot confirm the details at present but forensic experts are working to ascertain the nationalities of the terrorists," said Kenyan President Uhuru Kenyatta, in a televised address Tuesday.

The so-called White Widow, Samantha Lewthwaite, has been linked to terror activities in East Africa, and reports a white woman was among the attackers immediately sparked rumors of her involvement.

But while British authorities were careful to avoid speculation, Kenyan foreign minister Amina Mohamed said "two or three Americans... and one Brit" were involved in the attack. The British attacker, Mohamed said, was a woman who "has, I think, done this many times before."

Lewthwaite is known as the "White Widow" for her marriage to Germaine Lindsay, one of four bombers who blew up three subway trains and a bus in the July 2005 bombings that killed 56 people in London. She is wanted by Kenyan officials on terror charges.

Lewthwaite, who has been on the run in East Africa for more than two years, was fingered by Kenyan police after the discovery of a fake passport bearing her photograph in a house linked to known terrorists. She has been charged in absentia with planning attacks in Kenya in 2011, including on venues popular with Westerners.

The attack on the Westgate mall in Nairobi, which began on Saturday, left at least 62 people dead, as well as several members of the Kenyan military who responded to the attack, and several of the al-Shabaab terrorists involved.