Detectives investigating a serious sexual assault in the grounds of a library in Long Eaton are appealing for witnesses.
A 30-year-old woman was walking through the town centre after leaving Manhattan's nightclub in the early hours of Sunday, July 6.
Derbyshire police say the victim who had been walking with a man who had joined her near to the nightclub.
They took a shortcut through the grounds of Long Eaton library, where the man sexually assaulted her.
He is described as white, in his mid-20s and between 5ft 8in and 6ft tall.
Detective Inspector Brian Bilby, who is leading the investigation, said he wanted to hear from potential witnesses or anyone who might recognise the man from the description.
He said: "This incident happened after a busy night out and we want to hear from anyone who might have spotted someone matching that description during the evening, in particular a male and female who were walking along Broad Street to the junction of Tamworth Road just before the incident.
"It doesn't matter how insignificant you think it is – if something seemed suspicious to you in any way then we want to know about it.
"I'd also urge people to be mindful of their safety and security on a night out and to stick with a friend and agreed plans when they're making their way home."
The sexual assault happened between 3am and 4am on Sunday, July 6.
Police want to hear from anyone that saw a man and woman walking in Broad Street, Northcote Street or Salisbury Street around those times, or do you recognise the description of the suspect?
Witnesses or anyone with information should call DC 3247 Parkin on 101, quoting incident number 237 of July 6th.
You can also call Crimestoppers, anonymously, on 0800 555 111.
