Officials in northeastern Kenya say at least 10 people were killed when attackers lobbed grenades into two churches.

Authorities say 40 people were wounded in the simultaneous attacks Sunday on a Roman Catholic church and an African Inland church in Garissa, near the Somali Border.

There have been numerous bombings and kidnappings in Kenya since October, when Kenyan forces crossed into Somalia to help that country battle al-Shabab Islamic militants.