March Tesco superstore on Hostmoor Avenue has reopened after a technical fault.
Residents told the Cambs Times that they had arrived to do their weekly shop when customers were told they could not enter the store and other customers were being escorted out.
Tesco closed the store while an engineer fixed the system which meant none of the tills were working.
A spokesperson said: "The March Hostmoor is back open today."
Do you have a breaking news story in Hertfordshire or Cambridgeshire? Email: hertslivenews@archant.co.uk or cambslivenews@archant.co.uk
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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