Muslim clashes in Nigerian city

Three people have been killed in clashes between Shia and Sunni Muslims in a northern Nigerian city.

Fighting broke out when a Shia group attacked Sunnis at a mosque in the city of Sokoto, in front of the Sultan of Sokoto's palace.

Police say they made several arrests after the violence, which follows the killing of a Shia last weekend.

The BBC's Ibrahim Dosara in Sokoto says Shia are a minority among the predominantly Sunni population.

Nigeria's 130 million people are roughly equally divided between Muslims in the north and Christians in the south.

Correspondents say that poverty drives rival groups to compete for scarce resources, such as land.