COTABATO CITY — Four alleged gunrunners were arrested during a buy-bust operation conducted by police in Barangay Villarica, Midsayap, Cotabato province, on May 30, an official said Sunday. Lt. Col. Niño Lope Briones, acting regional chief of the Criminal Investigation and Detection Group–Regional Field Unit–Bangsamoro Autonomous Region (CIDG-RFUBAR), said the buy-bust operation under “Oplan Paglalansag