Washington Police are investigating an accident that sent two people to the hospital and tied up traffic for hours Wednesday. It happened at the intersection of Whispering Pines Road and West 15th Street around 4:30 p.m. Authorities aren't sure what caused a pickup truck and van to collide. The driver of the truck had to be cutout of the wreckage. Police say he was suffering from major injuries. Police say the driver of the van didn't appear to have severe injuries.