At least four people were killed in separate shooting incidents in Marawi City and Marantao in Lanao del Sur, a radio report said early Monday, May 9.
The shooting incidents occurred before the start of elections at 6 a.m., according to Notre Dame Broadcasting Corp. (NDBC) said.
In Marawi City, two persons were killed in an ambush near the Mindanao State University (MSU) compound.
Initial information showed unidentified men opened fire on the victims.
Meanwhile, in Marantao town in Lanao del Sur, two supporters of a local candidate were gunned down, supposedly by supporters of a rival, in the town hall premises.