Antigonish County RCMP are investigating a multi-vehicle collision that occurred on Hwy. 104 in Monastery.
Police say a transport truck had been travelling east on Hwy. 104 when it lost control, struck a guard rail and jackknifed in the road.
The transport truck was then struck by another transport truck, and six passenger vehicles.
RCMP say all vehicles suffered varying degrees of damage and whiteout conditions were reported at the time of the collisions.
A total of six people from the six passenger vehicles were injured in the collision; three were transported by EHS to a local hospital.
The remaining three people were treated by EHS at the scene and released.
The drivers of the two transport trucks were uninjured.
Hwy. 104 was closed for approximately four hours while vehicles were towed away and debris was cleared.
Hwy. 104 has since reopened.