Heavy flames and smoke billow from an apartment building in the 1300 block of Oxford Lane in Round Lake Tuesday afternoon. | Photo Submitted to Lake and McHenry County Scanner

Fire officials say 10 families were displaced after an extra-alarm fire at an apartment building in Round Lake Tuesday afternoon.

The Greater Round Lake Fire Protection District responded around 4:45 p.m. Tuesday to North Fox Trail and West Turtle Creek Lane in Round Lake for a report of smoke coming from a building.

Greater Round Lake Fire Protection District Battalion Chief Jay VandeBerg said firefighters arrived within five minutes and found an odor of smoke in the area but no visible fire.

Heavy flames and smoke billow from an apartment building in the 1300 block of Oxford Lane in Round Lake Tuesday afternoon. | Photo: Jimmy Bolf

Firefighters worked to locate the source and found smoke coming from a 20-unit apartment building in the 1300 block of Oxford Lane.

Crews determined the fire was in the attic and roof area of the apartment and used multiple hose lines to extinguish it, VandeBerg said.

The Mutual Aid Box Alarm System (MABAS) was activated to the second alarm level to bring at least a dozen fire departments to the scene.

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Officers from the Round Lake Police Department assisted with the evacuation and accountability of residents and no injuries were reported.

Heavy flames and smoke billow from an apartment building in the 1300 block of Oxford Lane in Round Lake Tuesday afternoon. | Photo: Jimmy Bolf

The fire was declared under control around 6 p.m. and 10 families were displaced from the building due to the damage, VandeBerg said.

The building had both sprinkler and fire alarm systems that protected the living area of the building but neither activated as the fire was in the unprotected attic space.

Five fire investigators were called to the scene and the cause of the fire remains under investigation.