The entire Zamboanga Peninsula and other parts of Mindanao were hit by blackout Saturday after an unidentified group bombed a tower of the National Transmission Corp. (Transco) in Lanao del Norte province.

Police said a bomb explosion damaged Transco's Tower 22 in Barangay Tingintingin, Kauswagan town around 2:25 a.m.

Police and military personnel in the province went on a heightened alert status after the blast. Authorities have yet to identify the people responsible for the attack.

Power supply in the entire Zamboanga Peninsula was cut off right after the blast. Parts of Misamis Occidental and Lanao del Norte also suffered blackouts.

The Transco was able to restore power in Zamboanga City around 4:30 a.m. Efforts to light up other affected areas were underway. With a report from ABS-CBN Iligan