Witnesses told the BBC the bodies of 13 people killed by machetes and gunshots were found Tuesday in a mostly Christian village 25 miles southwest of the polarized city of Jos. There have been no arrests in the attack, and the culprits have not been identified.
The latest violence is said to have started Friday after reports that a bus carrying Muslim wedding guests was attacked when it got lost returning to Jos.
The city, which lies on the frontier between Nigeria's Muslim north and Christian south, was reportedly quiet Monday as residents stayed home in fear of more violence.
Jos suffered deadly riots in 2001, 2008 and last year. Some 80 people died when bombs exploded around the city on Christmas Eve, and youths clashed two days later.
Hausa- and Fulani-speaking Muslims generally support the opposition, while ethnic Berom Christians favor the ruling People's Democratic Party.
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