Marlborough Police are warning young people not to put themselves in danger following reports of youths on roofs of buildings in the town.
Acting Sergeant David Tippetts said he suspects the youths are engaging in free running.
Police have gone out to try to find the youths when they have received reports but have not been successful.
The latest report was on Monday night involving about nine or ten youths. The buildings are at the top end of Cherry Orchard and include offices and derelict buildings.
Acting Sgt Tippetts said: “We have concerns that the young people engaging in this activity will fall through the roofs or fall off.”