Shoppers raise their arms as they are evacuated from the mall on Sept. 21. Nichole Sobecki, AFP/Getty Images
Nairobi, Kenya - An FBI official says the gunmen who carried out a deadly attack on an upscale mall in Kenya's capital most likely died during the four-day siege.
At least 67 people were killed in the assault that began on Sept. 21.
The FBI legal attache in Nairobi, Dennis Brady, says in an interview posted on the bureau's website that U.S. and Kenyan authorities believe that the four gunmen inside the mall were killed.
He says there is no evidence that any of the attackers escaped from the area where they made their last stand.
A New York Police Department report on the attack raised the possibility the gunmen may have escaped.
Brady says the four people who have been charged by Kenyan authorities are directly connected to the individuals who physically carried it out.
Militants linked to al-Qaida claimed responsibility for the attack on Nairobi's Westgate Mall. Al-Shabab says the attack was retaliation for Kenya sending its troops to Somalia to fight militants.
The Associated Press