NAIROBI, Kenya

NAIROBI, Kenya: NAIROBI, Kenya - Working near bodies crushed by rubble in a bullet-scarred, scorched mall, FBI agents began fingerprint, DNA and ballistic analysis Wednesday to help determine the identities and nationalities of victims and al-Shabab gunmen who attacked the shopping centre, killing more than 60 people. , according to Winnipeg Free Press. Video of the roof collapse showed massive carnage. The collapse came Monday, shortly after four large explosions rang out followed by billows of black smoke. Although a government minister said the terrorists had set mattresses on fire, causing the roof to collapse, the video showed such massive destruction that the explanation seemed unlikely to be the full story. Kenyan security forces keep guard as Kenya's Interior Minister Joseph Ole Lenku addresses a press conference near the Westgate Mall in Nairobi, Kenya Wednesday Sept. 25 2013. At least 18 foreigners were killed when the militants entered the Westgate Mall on Saturday, slaughtering men, women and children with assault rifles and grenades and taking people hostage. The current death toll is 67 and is likely to climb with uncounted bodies remaining in the rubble. AP Photo/ Jerome Delay A gaping hole in the mall's roof was caused by Kenyan soldiers who fired rocket-propelled grenades inside, knocking out a support column, a government official told The Associated Press. The official, who insisted he not be identified because he was sharing security information, said the soldiers fired to distract a terrorist sniper so hostages could be evacuated. (www.immigrantscanada.com). As reported in the news.