MOMBASA, Kenya — An official says 10 people have been wounded in a grenade attack at a restaurant south of Kenya's coastal city of Mombasa.

Kwale County Commissioner Evans Achoki said one of the two men on a motorcycle hurled a grenade toward customers at a crowded eatery called Tandoori in the Diani area. The attackers fled before police arrived.

Achoki said it was not clear who was responsible for the attack early Thursday.

Kenya has been the scene of multiple terrorist attacks since the country sent its military to Somalia in 2011 to fight the al-Qaida-allied Islamic rebels of al-Shabab.

In September, the group claimed responsibility for an attack on the Westgate Mall in Nairobi that killed 67 people. .