An April 2 fire at KUAR-FM in Little Rock, Ark., is being investigated as possible arson by the federal Bureau of Alcohol, Tobacco and Firearms. When the station suddenly went off the air around 5:30 p.m. Saturday, the station’s engineer went to the transmitter site on Shinall Mountain to determine the problem. Smoke was pouring from the building but the lock on the front door had been changed so he couldn’t enter. KUAR is currently using a standby transmitter to broadcast at a lower power, and General Manager Ben Fry estimates damages at between $100,000 and $200,000.