Grenade attack on Kenya bar

A suspected grenade attack on a Nairobi pub has wounded 12 people.

It comes just days after the United States warned of an imminent threat in the Kenyan capital.

The motive remains unknown, but Kenya's police chief said investigations had shown no links with the Somali militant group al-Shabab.

It comes a week after Kenya sent troops to Somalia to track down members of the group, which Nairobi blames for several kidnappings. Al-Shabab threatened reprisals if the troops did not leave.

Will Ross reports.