Nigeria ignored attack warnings
Those who died were reported to be mainly women and children
A Christian organisation in Nigeria has accused the army of ignoring warnings of attacks in the build-up to the weekend massacre near the city of Jos.
Hundreds died during attacks on three villages in an area which straddles the country s mainly Christian south and Muslim north.
The massacre is seen as revenge for a previous bout of killings in January.
The army has not yet responded to the accusations but troops are patrolling the area to prevent further clashes.
The head of the northern area of Nigeria s Christian Association said he believed mercenaries were involved.
Saidu Dogo told the BBC that fighters from neighbouring Chad and Niger took part in the violence