A man has been charged with murder after another man was found unconscious and seriously injured in a unit in a Brisbane suburb.

Police found a 50-year-old man “unresponsive with critical injuries” inside a unit on Ryan St in West End at about 4.30am on Saturday.

The man could not be revived and died at the scene, with police alleging his death was “suspicious” and “targeted”.

A 42-year-old Fortitude Valley man was arrested and charged with his murder on Sunday evening.

Body-worn camera footage of his arrest released by police shows officers approaching the man on a platform at a train station in Logan, with one drawing their Taser as the other puts the man in handcuffs.

Police then put a blue forensic suit over the man’s clothing before walking him to a nearby vehicle.

It will be alleged the 42-year-old man was known to people living in the unit.

Speaking to reporters on Sunday, Detective Inspector Wayne Francis said emergency crews did a “tremendous job” trying to save the man’s life.

“I can say it was a very traumatic scene, especially for those people - the first responders, the police and ambulance that attended,” he said.

No one was else was at the unit at the time of the incident, which Inspector Francis alleged was “targeted”.

“We are aware there were some occupants at the unit last night, and so that’s why the investigation at this stage would suggest that no one else in the community is in any danger, he said.

“We’re trying to identify and speak to all persons who may be present.”

The Fortitude Valley man is due to appear in Brisbane Magistrates Court on Monday.