Muzaffarnagar: Two youths were killed and two others seriously injured when their car collided with a tractor near Mandurpur on the Dehradun-Delhi National Highway, police said on Monday. Â
   Four friends, including Sorabh and Mohit, were on their way to Dehradun from Delhi on Sunday night when the mishap took place, police said. Â
   The bodies have been sent for a post-mortem examination and the injured have been admitted to a Muzaffarnagar medical college.  Â
   Police said the driver of the tractor also suffered minor injuries in the accident.
—PTI