Manila, Feb. 11 -- Authorities launched manhunt operations against gunmen, who separately killed three persons in Kabacan, North Cotabato, on Sunday. Supt. Maximo Layugan, North Cotabato police director, said the military-backed manhunt operations aim to capture the gunmen who killed Abdulbasi Limbucan, and the couple Rebecca, 48, and Danny Ballasama, 50, all residents of Poblacion Kabacan. Limbucan, a tricycle driver, was shot by a motorcycle riding-in-tandem while driving along USM (University of Southern Mindanao) Avenue, Kabacan at 9 a.m. Police recovered empty shells for .45-caliber pistol. "Police investigators are still trying to determine the identities of the culprits behind the killing of Limbucan," the police official said in a s...