NAIROBI, Kenya (AP) -- A Kenya police official says that an explosion on a bus in Kenya's capital has killed at least five people and injured 13.

Nairobi police chief Moses Ombati says at least five people were killed Sunday after an explosion on a 25-seater public transportation vehicle, and that there will likely be more casualties. He says 10 men and three women were injured in the blast. He did not give details on the cause of the blast.