Police in Kenya said three people died after two bombs hit buses in Nairobi. The deaths come just one day after a series of bombs killed three people in the port town of Mombassa.
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.
Twin blasts have been heard in the Kenyan capital Nairobi, Kenyan media reports.
At least three people have been killed in two grenade blasts in Kenya.
Authorities said grenade went off at a bus stop in Mwembe Tayari, in the coastal city of Mombasa, also injuring seven other people.
Separately, a bag containing an improvised explosive device was spotted near the coastal Reef Hotel in Nyali.
One of the two blasts in Mombasa, Kenya happened at a busy bus transport terminal, known as Mwembe Tayari, where a device inside a minibus exploded killing three people, according to witnesses.
A second blast was heard at the Reef Hotel, which lies along the Indian Ocean coastline but no casualties were reported in that explosion.
The Kenyan coast's large Muslim minority, many of whom feel marginalised by the predominantly Christian government, have been a fertile recruitment ground for Islamist militant networks.
At least three people were killed in two explosions in Kenya's port city of Mombasa on Saturday, witnesses and local media said.
There was no immediate claim of responsibility but Kenya has been hit in the recent past by gun and grenade attacks in Mombasa and in the capital Nairobi, which the government has
blamed on the al Qaeda-linked Somali group al-Shabaab.