Police have issued an appeal to trace a key witness who they believe may have information which could assist an ongoing investigation in Bradford.
He is described only as an Asian male who appeared to be small in stature.
He is believed to have been driving a black Volkswagen Golf in the Tong Street area between 2.30am and 2.45am on Sunday, 30 July.
The investigation is being conducted by Bradford District Safeguarding Unit and concerns a serious offence for which a 35-year-old man has been arrested and released pending further enquiries.
Detective Inspector Michael Ryan, said: “We believe this male spoke to a female who was waiting for a taxi in Tennis Avenue between 2.30am and 2.45am.
“He seemed concerned about her welfare and waited nearby in his vehicle until her taxi arrived.
“We need this male to come forward and speak with our officers as we believe he may have information which could be key to the progress of an ongoing investigation.”
Anyone who recognises this description is asked to contact the Bradford District Safeguarding Unit on 101, quoting crime reference 13170352819.