A highway crash in northern Alberta has left one girl dead and sent three others, all under the age of seven, and a 34-year-old woman to hospital. 

The girl was thrown from a pickup truck after it collided with a semi Friday near Nampa, Alta., at around 6 p.m., RCMP said.

Police said the pickup was travelling west on Township Rd. 810 when it failed to heed the stop sign on Highway 2, driving into the path of a northbound semi hauling canola.

Police said conditions were foggy at the time. 

The woman is in serious condition, but the three girls do not appear to have any life threatening injuries, police said.
 
The driver of the semi tractor was not hurt.

Nampa is south of Peace River, about 460 km northwest of Edmonton.