Bus crash on Highway 401 near Prescott

(Newswatch Group/File)

Update 10:44 p.m. Monday: The O.P.P. reported that all lanes of the highway have reopened.

PRESCOTT – At least four people — possibly five — have life-threatening injuries of the two dozen in hospital after a motor coach crashed on the westbound Highway 401 near here.

Emergency officials, including an Ornge air ambulance, rushed to the scene around 3:30 pm.

Initial reports suggested 30-40 had been injured after a bus collided with a rock cut along the westbound lanes on the highway, west of Blue Church Road.

It’s wasn’t immediately known the extent of the injuries, though a tweet from Leeds and Grenville EMS suggests some are serious.

Brockville General Hospital has declared a code orange – a declaration of a mass casualty incident – and patients are being diverted to Kemptville and Ottawa, the paramedic service tweeted. At least 20 patients were being taking to Kemptville.

O.P.P. later said four people have suffered life-threatening injuries while at least 20 more are in hospital.

At 4:53 p.m., the Brockville General Hospital tweeted that five victims are in critical condition while another patient was taken by Ornge to Kingston hospital. A Mandarin translator is also on site for help.

A section of the westbound lanes from Edward Street (County Road 18) to Maitland Road (County Road 15) are closed.