NAMPA, ID – Idaho State Police are investigating a two-vehicle fatal crash that occurred Tuesday afternoon on westbound Interstate 84 near milepost 39 in Canyon County.

The crash happened at about 3:06 p.m. when a white 2013 Ford F450 box truck, driven by a 21-year-old Nampa man with an adult male passenger, was traveling westbound and was struck from behind by a black 2007 GMC Sierra. The GMC was driven by a 31-year-old Meridian man and had juvenile passengers, according to ISP.

The occupants of the Ford were not injured. One juvenile in the GMC died at the scene. Three other occupants of the GMC were taken by ground ambulance to a local hospital.

Westbound lanes of I-84 were blocked for roughly three hours while emergency crews responded.

ISP was assisted at the scene by the Ada County Sheriff’s Office, Canyon County Paramedics, Nampa Fire Department and the Idaho Transportation Department.

The crash remains under investigation.