A total of 13 people were sent to hospital in three separate accidents along the Coquihalla Highway on Sunday.

BC Ambulance Service responded to a trio of crashes within a two-hour period on Sunday, all of which took place a couple dozen kilometres south of Kamloops, B.C.

The first and most serious was a multiple-vehicle collision that happened shortly before 11 a.m. and sent eight people to hospital, including one in critical condition. Three ground ambulances and one air ambulance responded to the call, but all patients were transported by ground ambulance.

The second crash involved several vehicles and saw three people in stable condition brought to hospital.

A third incident put two people in hospital after a single-vehicle rollover shortly before 1 p.m.

BC Ambulance spokesman David Weir says the causes of the crashes have yet to be determined but that there was significant hail and rain in the area at the time.

All three Coquihalla crashes took place in the vicinity of Lac La Jeune, near exit 97D.

Later in the day, yet another accident shut down Highway 97 roughly 11 kilometres north of Clinton, B.C. One person was transported in critical condition by air ambulance from the scene.

With files from The Canadian Press