-- 6:22 a.m. ET: At least 15 people have been killed by gunmen who attacked a Kenyan university Thursday, officials said, according to CNN affiliate Citizen TV. The officials said 550 people are still unaccounted for at the campus that had about 815 students.
-- 6:22 a.m. ET: The officials said one terrorist has been arrested as he tried to slip through the security cordon and flee the scene.