Several people were killed and others injured when an explosion ripped through a bar in the luxury Alpine ski resort town of Crans-Montana, Swiss police said early Thursday. “There has been an explosion of unknown origin,” Gaetan Lathion, a police spokesman in Wallis canton in southwestern Switzerland said. “There are several injured, and several dead.” He said the explosion took place at around 1.30am in a bar called Le Constellation, which is popular with tourists, as revellers rang in the new...