08/13/2013 08:33 EDT | Updated 10/13/2013 05:12 EDT

4 injured in rollover crash on Highway 407

The OPP have closed westbound lanes on Highway 407 at Britannia Road after four people were injured in a serious crash involving a truck and a tractor-trailer.

Ornge air ambulance was called in and has landed.

Early reports suggest two people are possibly trapped but there are no word on injuries.

OPP say both vehicles rolled over and the lanes will remain closed for several hours.