Avalanche warnings aired after heavy snowfall in Switzerland

Authorities in Switzerland have warned of high avalanche risk in mountainous regions of the Alpine nation after heavy snowfall in recent days

BERLIN -- Authorities in Switzerland have warned of high avalanche risk in mountainous regions of the Alpine nation after heavy snowfall in recent days.

Zurich's public transport company halted all tram and bus services in Switzerland's biggest city Friday, saying snow had brought down trees and blocked access to three vehicle depots overnight.

Many roads were also closed due to avalanche risk or fallen trees in the western Austrian region of Tyrol. In the Vorarlberg region a power cut left some 7,400 households without electricity. Austrian rail company OeBB said several train routes were disrupted by snow.