An Amtrak train with 78 passengers and 5 crew on board has derailed on a bridge in the US state of Washington. Emergency services are at the scene, and fatalities have been reported. The sheriff confirmed to media that there were "some fatalities" in the incident, adding that the exact number is still unknown. He also added that 70 people were on board the train in total. The sheriff's office has released photos of the mangled train cars dangling off the overpass and blocking the highway. Amtrak confirmed there were 78 passengers and 5 crew members on board the Cascades 501 train on its inaugural trip along the new route. The train was traveling from Tacoma to Olympia and derailed just west of DuPont, in Pierce County. An airlift helicopter is on its way to the scene, according to KIRO 7.