Fire crews are at the scene of a massive fire that tore through a large truck yard in Brampton.Firefighters were called to the area of Ward Road and Sun Pac Boulevard, near Williams Parkway and Humberwest Parkway, around 2:30 a.m. on Friday.680 NewsRadio reports a few workers were inside a building at the back of the yard that houses a repair shop and a truck washing station, but they were able to escape and call for help.No injuries were reported.The cause of the fire is not yet known.With files from Carl Hanstke, 680 NewsRadio