An explosion tore through a shopping complex in Nairobi's business district during Monday's lunch hour, wounding more than 30 people, and police said they were investigating whether it was a bomb attack.
Police spokesman Eric Kiraithe said anti-terrorism police were combing the blast site for clues, appearing to row back on an earlier suggestion by the police commissioner that a massive electrical fault might be to blame.
More than ten people have been killed in a string of attacks in Nairobi and the port city of Mombasa since Kenya sent troops into Somalia in October to fight al Qaeda-linked militants.
Nairobi has blamed the al Shabaab militants, who merged with al Qaeda earlier this year, for the surge in violence and kidnappings that has threatened tourism in east Africa's biggest economy and wider regional destabilisation.
