Firefighters made two visits within less than three hours to the same part of Dundee city centre on Wednesday night.
The first incident broke out between Commercial Street, Murraygate and Seagate at about 6.15pm.
Smoke was seen billowing down Commercial Street as firefighters attended the incident.
The Scottish Fire and Rescue Service said the outbreak had involved a small quantity of rubbish outside premises in the Murraygate.
Two appliances from Blackness Road attended and the small fire was quickly dealt with using a single hose reel.
Fire alarms were set off at Costa Coffee and the Yorkshire Building Society following the blaze.
Around 8.30pm, two appliances were back in the same area after the fire alarm again activated at the building society premises.