San Antonio police said a man was shot and killed in a deadly ambush on city’s south side Sunday night.

The fatal shooting happened in the 900 block of Grosvenor Street around 10:30 p.m. Sunday.

Police reported that the killer knocked on the door and fatally shot the victim as he opened it.

Authorities said there were four people inside the home at the time.

The victim’s name has not yet been released.

Witnesses reported a man running from the scene in white shorts. It’s unclear if that was the shooter.

The shooter will face murder charges.