Police are investigating a report of two teenage girls being forced into a car.
West Mercia Police said a member of the public reported two females, aged around 17, being "pulled forcibly" into a white Mercedes on Glebe Street, Wellington, Shropshire, in the early hours of Sunday.
The girls were wearing black tops and mini-skirts and the car was seen travelling in the direction of Dawley Road.
Officers said they had no reports of missing people at this stage, and wanted to speak anyone with information as a "matter of urgency".
Detective chief inspector Ally Wright said: "While we're still not sure if an offence has taken place, I am extremely concerned by the nature of this call.
"There may be a fairly innocent explanation, but we need to check on the safety of these two females.
"If you are one of the females involved in this incident - or know the females involved in the incident - please contact us.
"If you were the driver of the white Mercedes in Glebe Street around 12.25am or indeed a passenger, please get in touch.
"As I said, there may be an innocent explanation, and if there is we can stand down our investigation."
Anyone with information is asked to call police on 101.
