An investigation has been launched after a man reportedly chased a group of three girls after he had indecently exposed himself to them.
Police say the incident happened in Maple Road, Downham, between 6.30 and 6.45pm on Friday evening.
A Norfolk Police spokesman said three teenage girls had been walking along the road when a man approached them, exposed himself and made a lewd remark towards them.
The girls ran off down Poplar Road, with the man chasing them for a few seconds before he fled in an unknown direction.
The man is said to be white and aged between 30 and 40. He was wearing a red checked shirt and white underpants, with no trousers.
Anyone who witnessed the incident, or who has information, is urged to contact PC Tamsin Raines, of Downham police, via the non-emergency 101 number