A 29-year-old man has been arrested after reports a male exposed himself to young girls in Corby town centre.
He has been released on bail while police carry out further inquiries.
The incidents took place between Sunday, May 19, and Thursday, May 23.
A police spokesman said: “Three reports were received of a man driving a small red car, stopping and exposing himself to young girls.
“We would like to speak to anyone else who may have been approached in similar circumstances, in Corby or further afield.”
Police are also trying to trace a woman who is believed to have accepted a lift from the man and they are appealing for her to come forward.
Witnesses, or anyone with information, are asked to call the police on 101.