Gloucestershire police in postcard appeal after sex attacks
Some 3,000 postcards are being sent out by police investigating three sexual assaults in Gloucestershire.
The attacks in Cheltenham, Innsworth, and Gloucester, all took place in the last nine months and have not been formally linked by police.
Police hope the postcard appeal will trigger new information or encourage further witnesses to come forward.
A reward of up to £5,000 has been offered for information leading to an arrest and conviction.
Two men from the Gloucester area have been arrested during the course of the investigation and are on police bail.
Det Sgt Angela Middlewood said: "We still believe someone in the local community knows who committed these crimes and we want them to come forward.
"We are still determined to find the person or people responsible for these horrific attacks, and we need the community's help."
Of the three crimes being investigated, one took place in the Hester's Way area of Cheltenham on 30 November 2011, one in Innsworth on 19 January and one in the Coney Hill area of Gloucester on 2 May.
Last month the crimes were reconstructed by the BBC's Crimewatch programme which police said generated a number of useful leads.