A smoke device used to deter burglars was set off at a Boots store.
Fire officials told the Oxford Mail that they were called about the incident at Boots in Chipping Norton on Thursday night, but said there was no fire.
The device, a so-called smoke cloak, is used to impede burglars, although it has not been confirmed whether there was a break-in.
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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