Nigeria: Security forces kill oil militants, separatists

Nigerian security forces clashed with oil militants and Biafran secessionists in separate bloody confrontations Monday that killed at least 20 civilians and two police officers, officials and witnesses. The violence erupted in Nigeria's restive south as the military mounted an offensive in the oil rich south-central Niger Delta and separatists protested in the southeast.

Over the weekend, soldiers fired on speedboats believed to be carrying Niger Delta militants preparing to strike oil installations and killed or wounded an unknown number, army spokesman Col. Sani Kukasheka Usman said.

The Ijaw Youth Council, a community group, accused soldiers of firing Saturday night on...