Kenyan media and police have said that two buses driving along a busy highway in the Kenyan capital Nairobi were struck by explosive devices thrown at them.
As yet there has been 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.
More top news
The majority of parents forbid their child to walk to school because they worry for their safety, an exclusive poll has found.
Singer James Blunt has called his best-selling hit You're Beautiful "annoying".
Owners could be fined £20,000, forced to take their dog to obedience classes or have them neutered if the public complain.