A South Jacksonville hotel remained closed Monday while assessing damage caused by a weekend fire.

Firefighters were called at 1:47 p.m. Sunday to Holiday Inn Express Hotel at 2501 Holiday Lane.

South Jacksonville Fire Chief Rich Evans Jr. said the initial call was for an automatic fire alarm but, while en route, firefighters were notified of a water flow alarm, which was an indication the sprinkler system had been activated.

Upon arrival, they found heavy smoke on the second floor coming from Room 218.

“The biggest brunt of the fire was extinguished by the sprinkler system,” Evans said.

Although the fire was isolated to the room, there was moderate smoke damage and extensive water damage to the hotel. A damage estimate has not been determined.

Evans believes the fire started in an air conditioner.

“The origin of the fire came from that air-conditioner unit and was contained in that area,” he said. “There was no other source besides that air conditioner.”

About six or seven rooms were booked at the time. Everyone was able to get out when the alarms sounded, Evans said.