Nigeria's top Muslim leader said on Wednesday that 300 people, mostly Muslims, were killed in Sunday's attacks by Christian militia in the town of Yelwa in the central Plateau state.
Justice Abdulkadir Orire, secretary general of the Jama'atu Nasril Islam, described the killings in the remote farming town as "genocide" and said they took the death toll from three months of ethnic violence there to at least 700-800 people.
"The information we have is that 300 people died and they are mostly Muslims. We call it a genocide because they are killing women and children," Orire told Reuters in a telephone interview from his Kaduna headquarters.
The conflict between the Christian Tarok tribe and Muslim Fulani is rooted in competing claims over the fertile farmlands at the heart of Africa's most populous nation, and it is fuelled by religious and ethnic differences between the groups.
Orire said Christian militia used machine guns in the attacks which left most of Yelwa's buildings including a mosque destroyed, and criticised the Plateau state governor for apparently inciting violence.
He said police stationed in Yelwa had been withdrawn four days before the attack, despite complaints from local Muslims that they were surrounded by Taroks and tensions were rising.
"It seems the governor is supporting the move. We heard that the government said non-indigenes should move out of the area," Orire said. "That is very bad. He should look after everyone in the state and not just his own tribe."
A Reuters correspondent in Yelwa on Tuesday saw thousands of Muslims lining the body-strewn streets chanting religious slogans and vowing revenge on the attackers.
The state deputy governor, who visited Yelwa on Tuesday, ordered soldiers to shoot troublemakers on sight and announced a dusk-to-dawn curfew.
His heavily armed convoy, which was also carrying workers to dig mass graves, could not stop in the town because of the heightened tensions, a policeman in the convoy said.