According to investigators, the man came into Northley Middle School on Concord Road in Aston on Tuesday. The school was being used as a polling place for the primary election.
Police say a man talked to 14-year-old girl and left, possibly to cast a vote. He returned and talked to the girl again.
In their last conversation, police say the man asked the girl if she wanted him to give her a ride home. The girl declined, went into the school, and told a teacher.
The man has not been located, and for now police say they simply want to talk to him.
Anyone with information is asked to call Aston police at 610-497-2633.