Hundreds of people are reported to have been killed in central Nigeria after Christians and Muslims clashed over the result of a local election.
A Muslim charity in the town of Jos says it collected more than 300 bodies, and fatalities are also expected from other ethnic groups, mainly Christians.
There is no official confirmation yet, and figures are notoriously unreliable in Nigeria, says the BBC's Alex Last.
Police have imposed a 24-hour curfew and the army is patrolling the streets.
They have been given orders to shoot on sight in an effort to quell the bloodshed, some of the most serious in Nigeria in recent years.
$10 Off Any Order for Black Friday - Cyber Monday at TheNerds.net!