Blasts recorded in Cotabato City, Maguindanao ahead of polls

Metro Manila (CNN Philippines, May 13) — Police have received reports of explosions in a number of areas in Mindanao on election day.

According to the Maguindanao Police Provincial Office, a blast happened at 1:05 a.m. in Barangay Poblacion Dalican in Datu Odin Sinsuat.

The police said the blast may have been from a hand grenade thrown by "unidentified motorcycle riding suspects."

No one was reported hurt, and authorities are investigating the incident.

This was the second explosion in the province, the first after 9 p.m. Sunday in Datu Saudi Ampatuan.

Another blast was also reported in Cotabato City around 10 p.m. Sunday.

Speaking to CNN Philippines Monday, Philippine National Police (PNP) chief, PGen. Oscar Albayalde said the blasts were "grenade throwing incidents in vacant lots" and happened far from polling centers.

Albayalde believes the incidents were meant to scare people.

Albayalde also mentioned a shooting near a polling center in Estino, Sulu where six people were injured.

"This incident is probably an election-related incident," he said.

CNN Philippines stringer Dennis Arcon contributed to this report.