Six farms and farm shops across East Sussex were targeted by burglars in a single night, with meat, butchery equipment and alcohol among the items stolen.
Sussex Police are investigating the break-ins, which happened overnight between Friday 6 and Saturday 7 November.
The incidents took place at premises in Little Horsted, Hadlow Down, Mark Cross, Ringmer, Glynde and Mayfield.
Detectives believe the burglaries are linked and that a group of four people may have been responsible.
Police have released CCTV footage showing four people at one of the farms and are also seeking information about a white Vauxhall van found near one of the locations.
Detective Inspector Rob Tillyer, from the Burglary Team, 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.
"We recognise the hugely disruptive and intrusive nature of these offences and colleagues from Neighbourhood Policing, Rural Crime Team and Burglary Teams have provided a combined response.
"We have attended each location, completed initial enquiries with the assistance of forensic examiners where suitable and we are reviewing CCTV.
"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."
Neighbourhood officers and the Rural Crime Team have also increased patrols in affected areas.
Businesses are being advised to secure access points, buildings and vehicles and report suspicious activity.
Anyone with information, CCTV or dashcam footage that could assist the investigation is asked to contact Sussex Police on 101, quoting Operation Trek.
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