Lincolnshire Fire and Rescue says a bin fire behind The Forum in North Hykeham last night (Saturday) was sparked by a discarded cigarette.
Firefighters from North Hykeham used one hose reel jet to put out the blaze in an industrial bin.
The alarm was raised just after 8.20pm.
A spokesman for fire and rescue said: “The fire was caused by a discarded cigarette.
“Always make sure you put your cigarettes right out before disposing of them.”