Police are looking for a man spotted loitering outside a school toilet block at Cardiff.
It happened at around 9:30am Tuesday morning with students telling teachers who then called police.
He has a similar description to the man who's recently been exposing himself and performing indecent acts in front of schoolgirls in the area.
Police say he has a medium build, tanned complexion, dark hair and is unshaven and was wearing a grey jumper and prescription glasses.
They're urging anyone with information to call Crime Stoppers on 1800 333 000.