Dozens of people have been killed or are missing after parts of Afghanistan were hit by heavy snowfall and icy conditions.

Officials in the western province of Herat say at least 43 people have died in Ghorian district over the last two days. The heavy snow has caused avalanches, trapping many people, including local shepherds and their livestock.

The bad weather also has blocked roads, preventing the delivery of much-needed food and supplies to parts of the country.

Afghanistan already is facing a severe food shortage due to high grain prices and rebel attacks on United Nations food convoys.