A persistent flasher is believed to be stalking the Honeybourne Line in Cheltenham, putting people off walking the route.
Police have confirmed yet another incident of a man committing a lewd act on the walkway, which runs between the Prince of Wales stadium and the railway station.
It is the third time in the past six months there have been reports of a man exposing himself or acting bizarrely towards others using the path, which is popular with joggers and walkers.
Officers now say it could be the same person and have stepped up their efforts to catch the man, who is described as in his 20s and around 5 ft 8 ins tall.
Police released a CCTV image of a man they want to speak to in relation to an incident on April 24.
“We can't rule out the possibility that the man seen performing a lewd act in the area this week is the same man who committed a lewd act in April,” said a force spokesman.
“Officers are continuing their inquiries into these incidents and carrying out regular patrols along the line.”
The most recent incident of lewd behaviour was reported by a member of the public at 1.15pm on Tuesday. A man was seen walking around with no clothes on, performing a lewd act near the athletics stadium end of the line.
Officers arrived at the scene but by that time the man had disappeared.
It comes after warnings went out on Facebook in April advising girls to watch out for a man acting bizarrely, asking women to use their mobile phones and following them.
Another police appeal went out in January following reports of a flasher on the line.
Police say they are hoping to extend CCTV footage of the line to make it safer.
“We're also reviewing CCTV along the line and working with Cheltenham Borough Council to try and extend the CCTV network if possible,” added the spokesman.
“In the meantime we appeal to anyone who knows anything about these incidents or recognises the man in the images to call us.”
The council forked out £65,000 on CCTV cameras two years ago to improve security on the Honeybourne Line.
Neil Wilson, chairman of the Friends of the Honeybourne Line, said he was sorry to hear about the latest incident, but urged people not to be put off using the path.
He said. “It is very disappointing that one or two oddballs are choosing to do what they are doing, but we mustn’t let them spoil if for everyone else.
“The more people we can get using it the better because it will deter people from acting in such a way.
Neil said the Friends group will hold a meeting with police later this week to discuss moves to make the line safer.