Muslim-on-Muslim violence in Nigeria

Authorities are blaming members of a radical Muslim sect for the killing of an Islamic cleric in northeastern Nigeria. Police chief Mike Zuokumor said that when the police responded to the scene of the attack in Maiduguri, a police patrol was ambushed by a blast that wounded three officers. The violence comes amid deadly post-election rioting elsewhere in the north. The radical Muslim sect known as Boko Haram has targeted police and clerics who oppose the group in a string of killings. Members also have attacked Christian churches and engineered a massive prison break.