A black and white CCTV image of four people at night near a farm gate. The large metal gate is in the foreground and a path leading off into the distance.
Six sites have been hit in a single night of burglaries at farms and farm shops in East Sussex, police say.
The incidents happened in Little Horsted, Hadlow Down, Mark Cross, Ringmer, Glynde and Mayfield across Friday night and Saturday morning, Sussex Police said.
The owners of South Brockwells Farm Shop near Uckfield previously said they lost all their Christmas stock and butchering equipment, while other sites also reported alcohol being taken.
Det Insp Rob Tillyer said: "It is unusual to have multiple locations to be targeted in one evening but it is likely that these were opportunists and we consider the incidents linked."
Patrols from neighbourhood officers and those in the force's rural crime team have been increased and rural businesses have been urged to keep entrances, buildings and vehicles secure and to report any suspicious behaviour.
"We have attended each location, completed initial enquiries with the assistance of forensic examiners where suitable and we are reviewing CCTV," Tillyer added.
"We can assure the victims that we are making extensive enquiries with the aim of identifying the offenders, bringing them to justice and recovering stolen items."
Sussex Police said it was looking for information about a white Vauxhall van, which was found near one of the sites.
The force is also encouraging anyone with information which could help officers to contact them.
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A bald middle-aged man wearing a blue and white striped butcher's apron holds up a string of sausages in a commercial kitchen.
A CCTIV image in black and white of a farm in Northumberland. There are three people beside a gate. One who is facing the camera is wearing a balaclava. A fourth person is attempting to climb a fence. A house is on the right with lights on, and a Land Rover is parked on the other side of the fence.
Two police officers, with their backs to the camera, walking down a country lane with hedges on either side.
