About 1,000 litres of fuel was siphoned off from a Melbourn oil tank by thieves.
The owners filled up the tank in Royston Road at the end of last month, and returned on Friday to find it empty.
Police have no description of the thieves and it is unclear at what point the fuel was stolen.
Anyone with any information is asked to contact police on 101, quoting crime reference number CF0071490216.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here