Police say three Irving firefighters have been hurt and a trucker killed when his 18-wheeler hit a ladder truck stopped at a DWI scene. Another driver who hit a stopped patrol car at the site also faces a DWI count. Irving police Officer Steve Burres says the firetruck rolled after being hit early Sunday. Burres says three firefighters, who were thrown from the firetruck, were transported to a hospital with injuries not believed to be life-threatening. The tractor-trailer rig ended up on its side and caught fire along Highway 183.