U.S.-led coalition and Afghan troops clashed with and called in air strikes on Taliban in western Afghanistan, killing and wounding more than 25 insurgents, an Afghan official said Tuesday. The joint force has been battling insurgents in Bala Buluk district of Farah province since Monday afternoon, said regional police spokesman Rauf Ahmadi. Two police officers were wounded in the fighting, which also involved coalition air strikes on the insurgents' positions, Ahmadi said. There were no reports of coalition casualties, the Associated Press reported. In Kabul, meanwhile, a suicide bomber on foot detonated himself Tuesday next to the walls of the city's historic Babur Gardens, a popular public park, wounding three civilians, said police official Ali Shah Paktiawal. The Taliban claimed responsibility for the blast. The victims were riding on a minibus at the time of the explosion, Paktiawal said.