Warrington Township police say a man groped a 15-year-old girl while inside the Target store on Easton Road on Thursday.
Investigators said when they went over the surveillance video, they saw the same man grope a second young girl.
Officials said he then left the scene in a silver, windowless van.
With droves of students expected to flood the retailer for back-to-school shopping, people are keeping a close eye.
The store has dozens of cameras and police are still reviewing footage.
If you have any information on the man seen in the video or similar incidents you are asked to contact police.
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