BAGHDAD, Iraq - Sunni, Shiite and Kurdish leaders called on Sunday for an end to Iraq's sectarian conflict and vowed to track down those responsible for the war's deadliest attack.

But as they went on national television to try to keep Iraq from sliding into an all-out civil war, fighting between Iraqi security forces and Sunni Arab insurgents raged for a second day in Baqouba, the capital of Diyala province north of Baghdad. By the end of the day, the province's latest casualty figures were a microcosm of the brutality in Iraq: 17 insurgents killed, 15 detained, 20 civilians kidnapped, three bodies found, one U.S. Marine killed and two wounded. The mayor of a municipality also narrowly escaped an assassination attempt that killed one of his guards and wounded three.During Saturday's fighting in Baqouba, police killed at least 36 insurgents and wounded dozens after scores of militants armed with assault rifles and rocket-propelled grenades attacked government buildings in the city center, police said.