LAOAG CITY - The president of the Association of Barangay Captains of San Nicolas town was gunned down early Saturday by still unidentified attackers in Barangay 22 San Guillermo, a report reaching the Ilocos Norte police said.According to witnesses, Mark Adrian Barba, 39, village chief of Barangay 6 San Juan Bautista, was on board a gray Toyota Innova, with plate no. NDA 8116, along with two other individuals, when they were ambushed at about 3 a.m. along the national highway while on their way home from a nearby cockpit arena.The victims were rushed to a nearby hospital but Barba was pronounced dead by the attending physician.Meanwhile, his companions, who were wounded in the attack, remain in critical condition.Responding police recovered multiple empty shells of M-16 Armalite rifle from the ambush site.Police investigators are still determining the identity of the attackers and the possible motive of the killing.Source: Philippines News Agency