New South Wales Police hold grave concerns for a man who was seen stumbling down a road in western Sydney before being bundled into a car as he screamed for help.

Key points: Police are concerned for the man's welfare, although no one has been reported missing

Police are concerned for the man's welfare, although no one has been reported missing The man was captured on CCTV stumbling down Lakemba Street in Wiley Park

The man was captured on CCTV stumbling down Lakemba Street in Wiley Park Less than five minutes later, witnesses said he was stuffed into the back seat of a hatch-back

Mystery surrounds the incident, which occurred on Lakemba Street in Wiley Park about 5:00am on Sunday, partly because no-one has been reported missing in the area.

Witnesses said they heard loud screams and saw a man being forced into a car by three men.

They said one was assaulting the man as two others dragged him in.

The victim, estimated to be aged 20 to 30, was reported as struggling to get free and screaming for help.

The three men are described as being of Middle Eastern appearance, aged in their mid to late 20s.

CCTV footage shows the victim stumbling east on Lakemba Street, holding his arm to his chest.

Detective Inspector James Dark said the footage was recorded within five minutes before the alleged abduction.

"He appears to have been assaulted before he was forced into that vehicle," he said.

"Whether at that point he has managed to get away they've come back up the street, we have a dark coloured hatchback, similar to a Toyota Yaris.

"He's seen coming through the footage and then off the footage when he's forced into that vehicle."



Police were called to the scene, but when officers arrived, the man and the vehicle were gone.

Authorities conducted a search of the area and local hospitals but found no one matching the man's description.

There have been no missing persons reports made in the area but police said they were extremely concerned for his welfare.

The victim was described as being of Mediterranean or Middle Eastern appearance, of slim build with short dark hair.

He was last seen dressed in a jumper and khaki coloured pants.

Detective Inspector Dark said the circumstances were unusual.

"It's not a common occurrence but we have concerns about the male and who that male is," he said.

"We need to know his identity and any witnesses who might be able to help with that."

Police said it was possible the men involved knew the victim and that his family may not be aware that he was missing.

"Until we identify who's involved, we don't have any theories at this stage, but certainly this is not a common occurrence for us and it is a concern for us," Detective Inspector Dark said.

Police have asked for more information about his identity and for any other witnesses to come forward.