Three people were arrested in connection with the theft of two mopeds from properties in Sinfin and Littleover.
Between 8am and 9am on Saturday, June 28, a Huoniao moped was taken from the driveway of a house in Blagreaves Lane, Littleover.
A Nipponia moped was also stolen from a house in Stroma Close, Sinfin, between noon on Saturday, June 28 and 9.30am on Monday, June 30.
Both mopeds were found on Redwood Park, Sinfin, at about 4.30pm on July 1.
Two boys, aged 15 and 16, were arrested in connection with the Stroma Close theft, while a 19-year-old man was arrested in connection with both thefts.
All three have been bailed pending further inquiries.
Anyone with information on the above incidents should call Derbyshire police on 101.