12/07/2013 09:27 EST | Updated 02/06/2014 05:59 EST

Saint-Jean-Baptiste friends die in violent crash

Two men were killed overnight when the car they were travelling in rolled off the road in Saint-Jean-Baptiste, near Mont St-Hilaire on Montreal's South Shore.

Police are still trying to determine why the driver lost control of the car. 

The car careened off the road on a curve close to the intersection of the Route de Rougemont and the Rang des Trente, rolling several times before it came to a stop when it hit a piece of farm machinery in a field. 

The incident happened at about 3:20 a.m. on Saturday.

The driver and the passenger, both in their 50s, were killed.

Both of them were well-known in the community, and two first responders who knew the pair had to be treated for shock.

Richelieu-Saint-Laurent regional police Capt. François Cinq-Mars said the men were on their way home from a party. 

Police said it’s possible that the driver was speeding and under the influence of alcohol.