TAMPA, Fla. -- Arson is being blamed for a fire at the Ybor Resort & Spa Ybor City early Saturday.

About 3:30 a.m., Tampa Fire Rescue responded to the fire at 1512 E 8th Ave. -- no one was inside -- and found heavy smoke and flames coming from the roof of the two-story, masonry building.

Firefighters quickly got the fire under control.

Investigators determined that an unknown subject or subjects illegally entered the building and set fires at several locations, according to Tampa Fire Rescue. The subject(s) fled undetected.

Damage to the structure is estimated at $100,000.

Anyone with information on the fire is asked to contact the Fire Marshal's Office at (813) 274-7000 or submit a tip by clicking here.

Other Ybor fires:

City says welder did not have permit

Welder hanging disco ball starts fire at Ybor Amphitheatre