One person is dead and at least 10 people have been taken to hospital after two separate accidents on the Coquihalla 15 kilometers south of Merritt Sunday afternoon.
Traffic was blocked in both directions.
Southbound traffic resumed shortly before 7:30 p.m., northbound traffic reopened just before 11 p.m.
Drivers in the area report between seven and nine vehicles involved in one of the incidents and report multiple emergency vehicles in the area.
Interior Health said the victims were suffering varying degrees of injuries and confirmed five had been taken to the Nicola Valley hospital in Merritt, while five others had been transferred to Royal Inland Hospital in Kamloops.
BC Emergency Health Service was also unable to confirm the severity of injuries, but says all patients were transported by ground ambulance.
Detours are available via Highway 3 or Highway 8 to Highway 1.
Drive BC estimates northbound traffic will be closed until at least 11 p.m.
Pictures and video from social media show hazardous, snowy weather on the highway Sunday afternoon.
In a release, RCMP say as a woman involved in a single-vehicle accident exited her car, it was struck by a northbound Jeep.
The second collision resulted in her death.
It goes on to say that as a member of Central Interior Traffic Services Merritt was securing the scene, their empty vehicle was rear-ended, resulting in at least four other vehicles being involved in secondary collisions.
The BC Coroners Service is investigating alongside Mounties.