Story highlights Attacks occurred around noon when someone drove vehicle into side of church

One explosion was followed a few minutes later by another bomb

There was no immediate claim of responsibility

Two bombs killed at least 11 people and wounded 30 in a church inside the military barracks in Jaji, Nigeria, on Sunday.

Armed Forces spokesman Lt. Col. Muhammad Dole said a suicide bomber drove a vehicle into the side of St. Andrew Military Protestant Church and exploded a bomb at about noon. A second vehicle exploded just outside the church several minutes later.

The wounded were taken to three hospitals. An investigation is under way, Dole said.

There was no immediate claim of responsibility, but the militant Islamist group Boko Haram has frequently carried out suicide bombings in churches in northeastern Nigeria.

Boko Haram, whose name means "Western education is forbidden," seeks to impose a strict version of Sharia law in the Muslim-dominated northern part of the country.