A man from Ilkeston has been arrested on suspicion of sexual offences at a stables.
Police have asked livestock and horse owners to be vigilant and report anything suspicious to them after the alleged incident at the equestrian property in Breaston Lane, Risley.
The 58-year-old man was arrested at 8.15am on Tuesday. He was questioned and released on bail pending further enquiries.
Contact Pc Sarah Carlile at Long Eaton police station if you have any information which could help in the investigation.