DATU UNSAY, Maguindanao - A grenade exploded outside the municipal hall here Monday morning, hours before votes from the barangay and Sangguniang Kabataan elections were to be canvassed in the building.
No one was injured in the explosion, which left a crater on the ground, police said.
Groups that want to sow fear among voters may be responsible for the incident, authorities said.
The blast failed to stop the elections in all 8 barangays of Datu Unsay.
The explosive lobbed at the southern part of the municipal hall may have been an M203 grenade or a 40mm round, investigators said.
— With reports from Lore Mae Andong and Harry Villareal, ABS-CBN News