Kenyan police have detained a suspect in connection with an explosion on a Nairobi bus that killed six people, the latest in a string of unclaimed attacks as the country marks 50 years of independence.
The death toll from Saturday's blast rose to six on Sunday after two injured people died from their wounds overnight, police said.
Nairobi police chief Benson Kibue said a suspect was being questioned over the attack on the 32-seat vehicle which had its rear end blown out by the blast.
"We have one suspect who was arrested soon after the incident. He is assisting us in the investigations," Kibue said, but he cautioned that it was to early to say whether he was "directly involved in the attack".
A warrant has also been issued for the arrest of a second suspect. Police published a photo of the male suspect and called on people to come forward with any information.
Police are working to determine whether the powerful explosion was caused by a grenade or an improvised explosive device and whether it was placed in the bus, carried by a passenger or flung from outside.
The ill-fated bus came from Nairobi's Eastleigh neighbourhood, dubbed "Little Mogadishu" because it is mainly populated by Somali immigrants and Kenyans of Somali origin.
