A Kenosha County sheriff’s official says three men shot to death at a drag racing event were “known gang members”, and investigators are trying to determine if a rival gang member killed them. Sheriff’s sergeant Mark Malecki said Monday the victims were all from the Chicago suburb of Illinois. Officials say they were shot Sunday night at a food area in the parking lot of Great Lakes Dragaway near Union Grove, at an event called Larry’s Fun Fest which attracted about five-thousand people. Sheriff David Beth says witnesses might not have wanted those involved to see them going to law enforcement at the track, and he hopes they’ll call his office now. The victims’ names were not immediately released.