RCMP say two separate crashes within a few hours of each other on highways in northwest Saskatchewan have claimed the lives of two women and three young children. Police say a 48-year-old woman who was driving a van, along with two boys aged 5 and 6, died when the vehicle collided with a truck early Friday afternoon on Highway 4, south of Cochin, Sask. All were from Flying Dust First Nation. Less than three hours later, a 29-year-old woman who was the driver of an SUV and a six-month-old boy who was also in the vehicle were pronounced dead at the scene of a crash with a motorhome on Highway 4, about seven kilometres south of Battleford. Police say both the woman and the boy were from Red Pheasant First…