A man exposed himself to primary school children in Bream yesterday.
Officers are appealing for information and urging vigilance after the incident outside the school on the High Street.
Children in the playground witnessed the act just after 1pm on Thursday (January 10).
The man is described as white, in his 40s, 6ft tall and with short black hair. He was wearing a black Puffa Jacket.
Anyone who saw the man or with any information should call 101 and quote incident 188 of January 9.
Police have spoken to the school and are encouraging parents and children to talk about stranger danger and visit the special Kids Aware section of the Constabulary's website - www.gloucestershire.police.uk/kids_aware for more safety information.