Police are appealing for witnesses after a man was seen exposing himself on two separate occasions in South Normanton.
The first incident took place in an alleyway off Storthfield Way at about 8.15am on Tuesday, 9th June 9 - a Derbyshire police spokesman said.
A 14-year-old girl was walking along the alley when she saw a man exposing himself.
The offender is in his early 20s, about 5ft 7ins, of skinny build, and was wearing jeans, a dark hoodie with the hood up, and a black jacket.
The second incident took place in Storth Lane at about 12.30pm on Monday, 15th June. police said.
The offender in that incident was also white and in his 20s.
He was wearing a black hoodie, black jacket, jeans and white trainers.
Police want to hear from witnesses or anyone with information on either of the offences.
Anyone with information should call Derbyshire police on 101, quoting crime reference 24235/15.
Alternatively, call Crimestoppers anonymously on 0800 555 111.