(Providence, RI) -- A fire in the bus yard for Providence Public Schools buses is being investigated as arson. Multiple media outlets are reporting at least a half-dozen buses were destroyed and others may have been damaged to a lesser extent when the fire happened at around 7:30 p.m. Thursday. School bus drivers have been on strike for nearly two weeks over a pension dispute with bus company First Student. Providence Mayor Jorge Elorza called the timing of the fire odd, but that officials aren't jumping to conclusions.