At least 28 people, including 22 children, were killed Tuesday night in a bus accident in Switzerland. Another 24 were injured. The accident happened around 9pm near Sierre when the bus, registered in Belgium, hit a curb and slammed into a concrete wall. The 46 children on the bus were returning to Belgium from a ski outing. This reconstruction is based on reports published as of Wednesday at 11:40am GMT. Sources: Radio Television Suisse, AFP, NY Times, BBC, Bild, Reuters
