A night of drinking among three construction workers turned violent when one of them shot and killed his two companions in Barangay Calulut, City of San Fernando, Pampanga.

Police said the suspect, also a construction worker, used an improvised firearm or "sumpak" to shoot his drinking buddies after an argument turned physical.

The three were drinking inside their shared barracks when a heated argument broke out.

One of them was hit in the face with a glass bottle during the fight. The suspect then left the area, got the sumpak, and came back to shoot the two victims.

Both victims sustained two gunshot wounds each and died on the spot.

"’Yung isang victim po, hinampas po allegedly — based po doon sa sinabi ng asawa ng isang biktima — ng baso ng kanyang kainuman sa mukha. And then after that, umalis po siya sa inuman and then kinuha po ‘yung sumpak na ito. And then pagbalik po ay pinagbabaril na po itong kanyang mga kainuman," PCOL Jay Dimaandal, Provincial Director of Pampanga Police Provincial Office, said.

Authorities have launched a manhunt for the suspect, who fled the scene after the shooting.