SHARIFF AGUAK, Dec. 5 -- Authorities are searching for two men responsible for a grenade attack in this town on which left four people injured Thursday night.

"Manhunt against the perpetrators is ongoing," Lt. Col. Jopy Ventura, spokesperson for the Police Regional Office-Bangsamoro Autonomous Region (PRO-BAR), said in an interview Friday.

Ventura said the explosion occurred at about 9:45 p.m. at a residential compound in Barangay Mother Poblacion.

Injured were Ryan Obpon, 51; Abdulazis Saludin, 20; Nasrullah Unayan, 27; and Jonalyn Mamay 24, all residents of the area.

They are now recuperating at the Maguindanao del Sur provincial hospital.

Police investigators are still trying to determine whether the suspects threw a hand grenade ...