Detroit police believe a serial killer who is targeting prostitutes is on the loose, following the discovery of a third slain woman Wednesday.

Chief James Craig said the killer seems to be targeting sex workers but he declined to go into detail.

“We’re not trying to create an alarm across the city,” the city’s top cop said at a press conference.

The homicides, which began in March, involved two women in their early 50s. The decomposing body of a third woman was found in a vacant house.

“We believe this is a serial murderer and rapist, and we want to alert all sex workers, particularly those who work inside vacant houses, to beware,” Craig said.

Saying there is a “pattern” at play: The male suspect appears to be luring women to vacant homes to rape and kill them, the chief added, according to the Detroit Free Press.

The first victim, Nancy Harrison, 52, was found March 19 and was believed to have died from a drug overdose. But the medical examiner later found she died of blunt force trauma.

The second victim, Trevesene Ellis, 53, was discovered May 24. Her cause of death remains under investigation.

Both women were found in vacant homes on Detroit’s east side.

Investigators were unable to determine the identity or race of the third victim because her body was so badly decomposed.

“We believe all three are connected. … We have no suspect description at this time,” the chief said.

With Post wires