Feuding ethnic groups clashed in a third day of violence that has claimed at least 32 lives in southern Pakistan, authorities in Karachi said. The fighting between Pushtu-speaking Pathans and Mohajirs, Urdu-speaking migrants, was the worst ethnic violence in Sind province in several years, authorities said. The rioting allegedly started Friday when Pathans fired on a group of Mohajirs. Other reports said the stabbing of a Pathan bus driver was the cause. The Mohajirs, who fled to Sind when British India was partitioned in 1947, have demanded a separate province.