JOS, Nigeria,  (Reuters) – More than 150 Nigerians  have been killed and dozens injured in three days of clashes  between Muslim and Christian gangs in the central city of Jos,  where police imposed a 24-hour curfew, residents said.

The governor of Plateau state yesterday sent extra security  forces to the state capital to prevent a repetition of clashes  in November 2008, when hundreds of residents were killed in the  country’s worst sectarian fighting in years.