Police said the suspect, Dante Mostales, yielded a homemade shotgun and a 9-mm Llama pistol.
Probers believe Mostales was one of six men, suspected to belong to a crime syndicate, who lobbed a grenade at the patrol car of the four policemen.
Senior Superintendent Nelson Nario, provincial police director, said the four cops were checking out a report of extortion activities when they were attacked. — Charlie Lagasca