Eight people are missing following a landslide in an alpine valley in south-eastern Switzerland, police says. The landslide on Wednesday forced the evacuation of a village in the Val Bondasca region, officials said. German, Austrian and Swiss citizens are among those missing, Graubünden cantonal police said in a statement. Pictures from the scene show rocks and debris scattered across roads. A helicopter is helping in the search and rescue operation, Swiss media report.The landslide happened at about 09:30 local time (07:30 GMT) on Wednesday when boulders and earth cascaded down the side of the Piz Cengalo mountain, the Engadiner Post newspaper reported.