Two trains have collided in Denmark, leaving five people critically injured. Police have called it a major incident. The collision happened early Thursday near Hillerød, north of Copenhagen. Roughly a dozen others have minor injuries, according to the Greater Copenhagen Fire Department. A spokesperson for the North Zealand police says there were 38 people aboard the two trains. Investigators are looking into the cause of the collision. Photos show the front ends of the trains smashed, but both remain upright. The mayor of Gribskov says some of those injured were flown to the hospital. The crash occurred on a local rail line used by many residents.