A Jumbo supermarket in the Suydersee shopping centre in central Dronten was evacuated as a precaution on Thursday morning after a carbon monoxide detector sounded at around 9:30 a.m. Firefighters measured the air but did not detect carbon monoxide. The alarm had gone off near a cooling unit, according to a fire department spokesperson.

The matter was handed to the store’s owner, who was advised to have a technician inspect the cooling unit. Staff remained outside while the measurements were taken.