Two seven-year-old girls may have become the latest victims of a sex attacker stalking Berkshire parks.
The youngsters were approached by the man as they played on swings at Woosehill Meadows in Wokingham.
However, police fear the attacker may be the same man who earlier exposed himself to girls, aged six and eight, in Alder Moors Park, Woodley, on 10 May.
The suspect is in his 20s, fair-haired and of medium build, and was wearing blue shorts and a white T-shirt at the time of the Woosehill Meadows assault on Wednesday at 1300 BST.
Detective Sergeant Tom Judge said: "We're treating these matters very seriously and would like to reassure the public that officers are working to find this man.
"The second assault happened in a busy area on a warm afternoon and we believe there were a number of other people who were in the park at the time who may have also seen this man.
"I would appeal for people who were in the park or who saw someone matching this description to come forward as soon as possible.
"I'm also urging people who may have a friend, neighbour or family member who matches this description to come forward. All calls will be treated in the strictest confidence."