Men from two rival tribes exchanged gunfire Monday in a dispute over water in southwestern Pakistan, leaving five people dead and three injured, police said. The Brohi and Jamali tribesmen clashed over who should have the right to use water from a canal first to irrigate their fields near Goth Chakar Khan, a farming village southeast of Quetta, the capital of Baluchistan province, local police chief Ghulam Mahmood Dogar said. The clash, in which both sides were armed with AK-47 rifles, left three Jamali and two Brohi tribesmen dead, he said. Three people were arrested, The Associated Press reported.