A man flashed at a woman in Paisley Town Centre on Tuesday afternoon.
The 27-year-old woman was walking along Abbey Close when she heard a whistle.
When she turned around, a man was standing with his trousers and underpants around his ankles and was performing a sexual act on himself.
The incident happened at around 3pm on Tuesday afternoon. The man was standing at the rear doors of Paisley Abbey which are directly across from the Renfrewshire Council Headquarters.
Police are now hunting the man who has been described as 27 to 35 years old and around 5ft 6 inches tall.
He was wearing a brown bomber jacket and black trousers. On his head he was wearing a black baseball cap back to front.
If you have any information on the Abbey Close flasher please call Police Scotland on 101.