Gunmen use grenades, open fire at Nairobi's most upscale mall

Gunmen have opened fire inside Nairobi's most upscale mall.

Bursts of gunfire were heard from outside the mall Saturday, where cars were left abandoned. Witnesses say a half dozen grenades also went off along with lobbies of AK-47 gunfire that started at midday.

Nairobi police chief Benson Kibue says that gunmen besieged the building. He said officers are on the ground and are engaging the attackers. He says the men were trying to rob a shop within the mall when the shootout began.

Five dozen people rushed out from the mall as the gunfire and grenade attacks continued.