A 12-year-old girl was grabbed, and sexually assaulted as she walked across waste ground in Sheffield.
The attack happened as the girl walked from Barnsley Road to Earl Marshal Road in Grimesthorpe, police said.
An Asian man in his 20s is alleged to have followed the girl and pinned her to the floor before indecently assaulting her at around 9.20pm on Tuesday, April 15.
He had sideburns, a small fringe and was wearing a grey and yellow hoodie, black trousers and black trainers and was seen in Osgathorpe Park earlier in the day.
Call 101 quoting 1254.