At least 12 people have been killed and more than 1,000 homes burnt down in northern Nigeria.
It comes after a fight reportedly broke out earlier this week over a Christian girl converting to Islam, as we reported earlier this week.
Local media report that the violence in Kaduna state has escalated in recent days, with police recovering petrol bombs and arresting 18 suspects.
On Monday, an eyewitness told BBC News Pidgin that trouble started after a Christian girl from Gwari converted to Islam because of her boyfriend.
The witness said this provoked some Christian youths in the area.
Other reports suggest tensions between the two faiths had been simmering for some time.