PLAINFIELD - Police are investigating an early-morning break-in at Motorsports Nation in which a group of masked individuals stole two dirt bikes from the Plainfield business. At approximately 3:34 a.m. on Thursday, officers were dispatched to the Norwich Road business after a commercial burglary alarm was tripped. Police said three masked individuals forced their way into a door on the north side of the building and stole the KTM bikes from the showroom. The burglary took place in the midst of a massive nor'easter that pelted the region with nearly a foot of snow. Capt. Mario Arriaga said it's suspected the thieves waited until the store's lot was plowed before breaking in.