Members of a radical Muslim sect attacked a church in northeast Nigeria during a worship service, part of a series of assaults that killed at least 13 people, authorities said Saturday. The church shooting came as Boko Haram members attacked a beauty salon and fought government forces Friday night as part of its continuing sectarian battle against Nigeria's weak central government. In the last few days alone, the group has killed at least 44 people, despite the oil-rich nation's president declaring a state of emergency in regions hit by the sect. In Yola, the capital of Adamawa state, gunmen covered their faces with black cloth when they attacked Apostolic Church, local police commissioner Ade Shinaba said. Shinaba said at least eight worshippers died in that attack.