Detectives are appealing for information after a woman was found in a distressed state in Lancaster.
At around 3am on Thursday, a 22-year-old woman was found by a man on Caton Road who had concerns for her welfare.
The woman was taken to Royal Lancaster Infirmary, although at this stage it is unclear as to exactly what has happened to her.
An investigation is underway and police are appealing for anybody with any information to come forward.
Det Insp Andrew Bunn said: “The circumstances of this incident remain unclear at this time and we are still trying to establish exactly what may have occurred.
“I am particularly keen to speak with the man who found the woman. We believe he may have been driving a Maxi lorry. If this was you, or you know who this was, then please come forward.”
Anybody with any information can contact police on 101.