Suspected grenade blast in Kenya wounds 13

The attack came two days after the United States warned of an imminent threat of a terror attack in the Kenyan capital. Last week Somalia's most dangerous militant group, al-Shabab, warned of reprisal attacks inside Kenya for a Kenyan military incursion into Somalia.

But the early Monday blast did not appear to be such an attack. A police official who could not be named said 13 people were wounded but no one was killed. Chairs and tables at the pub were overturned after the explosion but there was no major damage.