A shooter remains on the run after a man was gunned down inside a unit north of Brisbane during the early hours of Friday.

Jacob Bell, 24, was visiting the unit on Young Street in Petrie when he was fatally shot in the chest by a gunman, to whom police believe Mr Bell was known.

Police investigate the scene of a fatal shooting at Young Street, Petrie. Credit:Jorge Branco

Detective Superintendent Tony Fleming said police did not expect the shooter to target anyone else after gunning down Mr Bell in front of several other people inside the premises.

While there were no specific suspects, detectives were speaking with a number of people after forensic and scientific officers combed the Petrie unit on Friday.