Somalia ? Islamic militants in control of most of southern Somalia warned Thursday that war will erupt over a U.N. decision authorizing an African force to protect the country’s virtually powerless government.

The U.N. Security Council unanimously approved the resolution Wednesday, hoping to restore peace in Somalia and avert a broader conflict in the region. Prime Minister Ali Mohamed Gedis welcomed the decision and urged its immediate implementation.

The resolution also partially lifts a 1992 arms embargo on Somalia so the regional force can be supplied with weapons and military equipment and train the government’s security forces.