Four people were hospitalized for minor injuries after a 20-car pile up on Interstate 95 Saturday morning.

A truck and tractor-trailer collided on I-95 south near Dale City shortly after 8 a.m., according to Virginia State Police spokeswoman Corinne Geller. That sparked a chain reaction on the snow-covered road, and at least 20 vehicles -- including four tractor-trailers -- collided, Geller said.

Four people, including the truck driver from the initial crash, were taken to area hospitals with minor injuries.

Southbound traffic on I-95 was diverted to the HOV lanes. All lanes were re-open by 10:30 a.m.