A roof of an apartment building burst into flames in the southern city of Loviisa just before noon on Thursday.
The fire was ignited by a hot work operation where bitumen was being heated. Bitumen is often used on the roof to protect residential buildings from water.
The firemen extinguished the fire in less than an hour. No one was injured in the fire but some of the apartments are now uninhabitable.
Loviisa is a small coastal town with about 15,000 inhabitants, of which almost half reside in the central area.
Loviisa is known from its charming old town with wooden houses, some dating back to the 17th century.
Many wooden detached houses are located near the apartment building that was now saved by the swift work of the firemen.