A Benning Street warehouse was damaged in a fire Thursday evening.

Lebanon firefighters responded to a fire alarm activation at 82 Benning St. shortly after 9:30 p.m., according to a Lebanon Fire Department news release. No one was injured. Firefighters are still investigating the cause, which is “not believed to be suspicious.”

After responders discovered black smoke coming from the 163,000-square-foot, mixed-use warehouse, they sent out a call for additional assistance.

“Initial investigation revealed a heavy smoke condition in the front office portion of the building with active sprinkler flow,” according to the release. Firefighters found that that the sprinkler system stopped the fire from spreading beyond the room where it had started, illustrating “how a working sprinkler system significantly reduced property loss and helped the single occupant in the building escape safely.”

Firefighters — including those from the Hartford, Hanover and Norwich fire departments — remained on the scene until 10:45 p.m.

The building is owned by Worcester, Mass.-based Benning Street LLC, and has an assessed value of $7.6 million, according to Lebanon property records.