Children were twice flashed by a stranger as they walked to school on Friday morning.
Two 12-year-old girls were walking behind two men in Fishermead Boulevard near Jubilee Wood Primary School when they were targeted at around 8am.
The girls left the scene on foot when one of the men turned around and exposed himself on two occasions.
The man who exposed himself is white, about 5ft 7ins, in his thirties, with blonde hair and stubble. He was wearing a dark blue or navy zip up coat and grey joggers.
The second man is white, about 5ft 11ins and of large build. He was wearing a dark blue puffa jacket and silky dark blue joggers.
One of the men was pushing a bicycle.
Both of the men were speaking in a foreign language, possibly Polish.
PC Jennifer Taylor said: “I would appeal to anyone who saw two men, one of whom was possibly pushing a bicycle, matching the descriptions to contact police immediately.
“If you saw something suspicious or have anyone information, no matter how insignificant you think it might be, please visit your nearest police station or call us on 101.
“If you don’t want to speak directly to the police you can contact the independent charity Crimestoppers anonymously on 0800 555 111 or online at www.crimestoppers-uk.org. No personal details are taken, information is not traced or recorded and you will not go to court.”