Swiss investigators look into causes of deadly coach crash A hospital in the Swiss town of Sierre is one of six that treated victims of Tuesday's coach crash. Twenty-eight people, including 22 children from Belgium and the Netherlands, were killed when their coach crashed into the wall of a motorway tunnel. A total of 24 children, who'd been on a ski trip, were hurt - some seriously. Around 200 police, firefighters, doctors and medics worked through the night, while 12 ambulances and eight helicopters took the injured to hospital. An investigation is now underway. Swiss prosecutors will want to know whether the cause of the accident was a technical problem or human error. The speed limit in the tunnel was 100 km per hour. Belgian officials say the travel firm had a solid reputation and the driver had arrived at the resort a day before the trip, according to the rules, and that the bus had passed a mechanic's test five months earlier. More about: Belgium, Bus accident, Switzerland, Traffic accidents, Victims