Reports of a man acting suspiciously close to the grounds of a Trowbridge school are being investigated.
Wiltshire Police said staff at Grove Primary School contacted them at 1300 BST.
Officers want to speak to anyone who was in the area at that time and may have seen or heard anything suspicious.
In particular they want to speak to a man aged in his 50s, of large build, with thinning grey hair, who was wearing a blue jumper.
Police believe the man described may be able to help their inquiries and appealed for anybody who knows him to contact them.