NAIROBI - Kenyan police said at least 10 people were killed when grenades exploded at two churches in the northern town of Garissa, in the latest in a string of deadly attacks since Kenya sent its troops to pursue al-Qaida-linked rebels in Somalia.

"So fare we have at least 10 killed, and more than 40 wounded following the grenade attacks," regional deputy police chief Philip Ndolo, told Reuters.