Kenyan authorities suspect militants are behind a grenade attack on a house near a church in eastern Kenya, killing two people and wounding at least two others.

Officials say it happened in the town of Garissa around midnight Saturday. A second grenade found nearby did not explode.

The violence comes as many people were planning to attend prayers for the Muslim feast of Eid al-Adha.

No one has claimed responsibility, but investigators are looking toward the Islamist militant group al-Shabab, which has staged attacks inside Kenya to protest military operations in Somalia.

The Kenyan military launched an offensive in Somali three weeks ago aimed at militants. The government has accused al-Shabab militants of crossing into Kenyan territory from Somalia and kidnapping several foreigners.