(Battle Ground, WA) -- Three people were killed in a wrong way head-on crash early Sunday morning on Highway 503 near Battle Ground. Washington State Patrol says a Dodge Challenger was driving the wrong way and collided with a Toyota 4Runner. The driver and passenger in the Challenger died at the scene. They weren't wearing seat belts. A passenger in the 4Runner also died at the scene. The 4Runner driver was hospitalized. The investigation into the cause of the crash continues.