A fire that destroyed four apartment buildings under construction in Pullman early Sunday has been labeled suspicious, and affects hundreds of Washington State University students who expected to live in the complex when classes begin. The Moscow-Pullman Daily News reported that some students had already made deposits for apartments in the Grove complex. Pullman Fire Chief Mike Heston said the cause of the fire is suspicious because there was no heat source that could have set it off. Police and fire officials are investigating. "At this time, this fire obviously looks suspicious, and it’s under investigation," Heston said