Four people were killed on Saturday when attackers threw an explosive device at passengers at a bus station in Mombasa

Four people were killed on Saturday when attackers threw an explosive device at passengers at a bus station in Mombasa

Two buses driving along a busy highway in the Kenyan capital Nairobi were struck by explosive devices thrown at them, Kenyan media and police said on Sunday.

There was no word on casualties and no immediate claim of responsibility but Kenya has blamed similar attacks on the al Qaeda-linked Somali group al Shabaab, which killed at least 67 people at the Westgate shopping mall in Nairobi last September.

Four people were killed on Saturday when attackers threw an explosive device at passengers at a bus station in Mombasa, and also targeted a luxury hotel in the coastal city.