A woman and two young children are dead following a crash involving a truck and a semi-tractor trailer hauling trucks on Highway 16, roughly 50 kilometres northwest of Saskatoon, this morning.

The woman who died was 26-years-old and from Corman Park, while the two children were a four-year-old boy and a nine-year-old boy, both from Langham, Sask.

RCMP and first responders say the semi had been traveling westbound on the highway, about 10 kilometres west of Langham, when the truck, carrying seven people, crossed the highway from a rural road and collided with the semi.

The collision happened at about 6:55 a.m. CST.

Highway 16 crash-3

RCMP investigate a fatal crash on Highway 16 near Langham, Sask. (Victoria Dinh/CBC)

According to MD Ambulance, four people — including an 11-year-old boy, a five-year-old boy, a 32-year-old man, and a 46-year-old man — were taken to Royal University Hospital in Saskatoon. They were travelling in the truck. The injuries suffered by the children and the 32-year-old man were described as serious, while the other man is in critical condition.

The lone 53-year-old male driver of the truck is from Martensville. He was transported to hospital with undetermined injuries.

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Emergency crews on scene of a fatal crash on Highway 16 near Langham, Sask. (Victoria Dinh/CBC)

Warman RCMP and an RCMP collision reconstructionist continue to investigate the crash. No charges have been laid, and the highway is now open.

A CBC reporter on the scene said the semi was hauling pickup trucks and that the crash left debris all over the highway.

Traffic was being rerouted around the crash site onto grid roads, then back to Highway 16 east of the river.

RCMP remain on the scene investigating the cause of the deadly crash. 

Air ambulance near Borden, Sask.

A STARS air ambulance was at the scene of a two-vehicle crash between the communities of Langham and Borden, Sask., on Monday morning. (Kelly Malone/CBC)