Gunmen suspected to belong to a radical Islamist sect attacked a village in north-east Nigeria, tying up men, women and children before slitting their throats, killing at least 15 people, according to witnesses.
The assault happened in the village of Musari on the outskirts of Maiduguri, the city where the sect known as Boko Haram first launched its guerrilla campaign of shootings and car bombings against Nigeria's weak central government.
"We heard some people chanting, 'God is great, God is great' amid sounds of banging on doors of houses at about 1am," said Mshelia Inusa, a primary school teacher in the village. "A voice was heard ordering people to be slaughtered and also voices of children were heard screaming."
Mr Inusa said he and others later saw corpses with their hands tied behind their backs and their throats cut.
Later, a security guard said he counted at least 15 bodies being brought from an ambulance into the morgue of a hospital in Maiduguri.
Boko Haram, which means "Western education is sacrilege" in the Hausa language, wants the nation to enact strict Shariah law and release its imprisoned members. More than 780 people have been killed in its attacks in 2012.