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.

At least 14 killed in explosion at weapons depot in Syria
US hits five Iranian oil tankers after attack on Navy ships
UK gives air traffic provider a week to probe outage that halted flights
Serbia's President Vucic dissolves parliament, calls snap elections
With large crowds attending, Norway lays King Harald to rest
Jordan intercepts 18 Iranian ballistic missiles
Air traffic control issue disrupts flights at major UK airports
At least 73 injured after Houthi rebels attack Saudi civilian and energy facilities
