UPDATE AT 8AM: The fire has been knocked down. Firefighters are working on hotspots.
UPDATE: KNOCKDOWN, crews interior putting water on hotspots, this is a large vacant bldg, previous fires due squatters, no inj's PIO1
— Las Vegas FireRescue (@LasVegasFD) January 20, 2017
Fire was in a vacant, boarded-up commercial building at 1320 Las Vegas Boulevard South. It was originally reported that it was in a house. The fire department says the building is used by squatters. The cause of fire is unknown at this time.
LAS VEGAS (KTNV) -- A fire has been reported at a vacant house near Las Vegas Boulevard and 4th Street.
The house is vacant and used by squatters according to a tweet by Las Vegas Fire & Rescue.
Las Vegas Boulevard has been closed in the area. Motorists should seek alternate routes.
This is a developing story. Check back for updates.