The avalanche on the Plaine-Morte ski track in Crans-Montana in southern Valais canton occurred in the early afternoon and left "several people buried", local police said in a tweet.
Israeli prime minister Benjamin Netanyahu on Tuesday slammed the "shocking" anti-Semitic vandalism of a French cemetery, which prompted a cabinet colleague to urge French Jews to "come home" to Israel.
Xinjiang is home to most of China's Uighur ethnic minority lives and has been under heavy police surveillance in recent years after violent inter-ethnic tensions.