This video from the Philippine National Police in Lanao del Norte posted by Cotabato City-based NDBC News on Facebook shows a fist fight among supporters of rival bets in Nunungan town, just before balloting opened on Monday.
The melee happened just outside a polling center.
Marine soldiers and police personnel eventually pacified the parties.
RELATED STORIES
1 person slain in Lanao del Norte before balloting starts
4 hurt as political campaign heats up in Lanao Norte town
MOST READ
LATEST STORIES