Police have sent an alert about a suspicious van in Coquetdale.
The white Citroen Berlingo van was seen calling at farms and driving into yards between 11am and 1pm last Monday.
When approached, the male driver said he needed battery acid for blocked nozzles on a tarmac machine which had broken down nearby.
He was around 40, wearing a safety helmet, hi-vis jacket and wellies.
Any sightings should be reported to police on 101.