Investigators are trying to determine the cause of an early-morning warehouse fire in Fort Lauderdale.

The fire started about 5:30 a.m. Monday in a warehouse at 1181 SW 26th Ave.

Fort Lauderdale firefighters arrived to find heavy smoke and flames coming from the warehouse. They quickly extinguished the fire and determined that there was nobody inside at the time.

The cause of the fire remains under investigation.