MANILA - Unidentified men lobbed a grenade at the house of Conner, Apayao Mayor Leonardo Dangoy in Tuguegarao City, Cagayan, leaving his cook dead and his three relatives wounded on Saturday.

Two motorcycle-riding suspects threw the grenade at Dangoy's residential compound in Barangay Caritan Norte at around 7.30 p.m., said Superintendent Jesse Tamayo, Tuguegarao City police chief.

The cook of Dangoy's family, Medrano Dungi Pilic, sustained shrapnel wounds on the head and chest which killed him instantly.

The mayor's son, nephew and nine-year-old granddaughter, meanwhile, sustained minor injuries.

Dangoy, who was inside the compound when the attack occurred, was not hurt.

Tamayo said investigators are pursuing a lead on the bombing's possible motive but he declined to confirm if the attack was politically motivated.

Police are also getting more clues on the suspects' identities from witnesses and CCTV footage from adjoining business establishments.

-- With a report from Danielle Rebollos, ABS-CBN News