MANILA - Two separate bomb attacks struck North and South Cotabato provinces on Saturday.
The first explosion occurred at Tower #103 of the National Grid Corporation of the Philippines (NGCP) in Carmen, North Cotabato was bombed at around 6 p.m.
Police said perpetrators failed to topple the installation.
No one was hurt in the explosion as it occurred far from a residential area.
NGCP officials declined to divulge additional details of the ongoing investigation on the bombing.
An explosion also rocked the the house of Vice Mayor Eliazar Jovero in Polomok, South Cotabato at around 9 p.m. on Saturday.
The blast created a crater and it damaged the ceiling and shattered the window glasses of the house, Jovero said.
Antonio Piamonte, a security guard in the residence, added that he saw two unidentified men riding a motorcycle stop near the house shortly before the explosion.
Piamonte tried to chase the two, but they quickly fled away after the explosion.
(LOOK: Explosion damages house of South Cotabato town vice mayor)
The police said they will conduct follow-up investigation because according to the vice mayor, he has not received any death threat.
The attacks come a day after a powerful explosion at a night market in Davao City left 14 people dead.
Security forces remained on full alert across the country on Sunday, following President Duterte's declaration of a "state of lawlessnes" in light of the Davao attack. -- With reports from Lore Mae Andong and Francis Canlas, ABS-CBN News
(READ: Duterte 'still angry' over Davao blast, says PNP chief)