Unidentified gunmen opened fire at a van along EDSA highway in Metro Manila's Mandaluyong City.
Local police said a woman, who sustained serious injuries from the shootout, is under medical care.
Checkpoint security checks in Metro Manila have intensified as the election gun ban is currently in place.
Officials said they are yet to determine the identity of the suspects and their motive for the attack.

Germany's Merz arrives in Kyiv to the sound of sirens and explosions
Protests demanding Indian election chief resigns escalate
US Coast Guard finds debris from missing medical aircraft off Nantucket
Trump names intelligence chief as AI czar
Trump shares Republican senator's phone number in feud over time switch