A mechanical fire that spread to the roof of the Fox Valley Ice Arena in Geneva forced the partial closure of the ice skating facility, authorities said.

Geneva Firemen were dispatched around 6:26 a.m. Sunday to 1996 S. Kirk Road on the city’s east side. The building is owned by the Kane County Forest Preserve District.

Geneva Fire Chief Mike Antenore said the alarm was upgraded when engines were on route to the scene when Tri-Com Central Dispatch reported there was smoke in the building.

“The first arriving fire company found heavy black smoke showing from the roof area on the west side of the building. Firefighters initiated an interior attack and brought the fire under control in approximately 40 minutes,” Antenore said in a news release.

Antenore said the response was upgraded to a box alarm because of the size of the building.

Fire department officials said the building’s sprinkler system activated and “held the fire in check” until the blaze was extinguished.

Firefighters contained the fire to a refrigeration compressor room.

The cause of the fire is under investigation. Damage estimates were in the process of being compiled Sunday afternoon.

“The facility resumed partial operations this morning and is expected to resume full operations later today,” the fire chief said Sunday.

Firefighters from Batavia, St. Charles, Elburn, West Chicago, Fermilab, South Elgin, Elgin, Wheaton, Bartlett and North Aurora assisted Geneva on the scene.

Antenore said no one was hurt.