NIGERIAN rioters killed at least 15 people today after a Muslim protest against the publication of cartoons of the Prophet Mohammed descended into violence, a police spokesman said. Witnesses said that protesters turned on the Christian minority in the northern city of Maiduguri, burning shops and churches, after police dispersed a rally called to condemn European newspapers that printed the caricatures. A police spokesman, Deputy Commissioner Haz Iwendi said that army troops and police reinforcements had been deployed to the city and that a curfew had been imposed to bring about a return to order. "We've arrested 115 people. Some...