Furniture store burns:   A defunct used furniture store on one of the busiest streets in Nitro caught fire Friday afternoon and was eventually demolished, firefighters said. At 5:35 p.m., Nitro Fire Department got called to the former Ace Furniture Sales, 2901 First Ave. and found heavy smoke pouring from the building and a nearby storage facility, Capt. Ron King said. The cause is still under investigation, but it is being treated as suspicious, he said. Nitro fire investigators had been told that vagrants might have been spotted around the building earlier in the day, but they never found anyone. Firefighters extinguished the blaze within an hour, then had the building torn down to keep the structure from being a nuisance, King said. Nearby businesses suffered some water and smoke damage.