A kayak was stolen from along the River Nene in Northampton.
Instructors took a group of children out kayaking on the river on Wednesday July 20 and, for a short time, a white Falcon Ace kayak was left unattended on the edge of the river behind Rushmills.
When the group returned, the kayak had been stolen.
The theft happened between 8.45pm and 9pm.
Anyone with information can contact Northamptonshire Police on 101. Alternatively, they can call the independent charity Crimestoppers anonymously on 0800 55511