Security forces on Sunday said they had killed three terrorists and arrested another, as they continued search and clearance operations in Swat. "During an exchange of fire between security forces and terrorists at Mauja Kandao, three terrorists were killed and one was apprehended," the ISPR said.Security forces conducted a search operation in Goal near Sakhra and destroyed four terrorist havens. They carried out another search operation at Kanju and recovered eight rifles, two pistols and ammunition. Forces also conducted search operations at Chaprai Banda and destroyed two terrorist training centres, the house of a terrorist commander, and a 25-metre tunnel.