The authorities in Nepal are to extend for free permits for foreigners prevented from climbing Mount Everest by last year's earthquakes.

More than 800 foreign climbers had paid up to $11,000 (£7,900) for permits for expeditions cancelled after quakes in April and May.

Climbers who missed out will be able to use the same permit for 2016 and 2017.

At least 19 people were killed on Everest in avalanches triggered by April's quake.

The April quake led to an avalanche on the Everest base camp, burying tents under huge blocks of ice. Photo: AFP

Nearly 9,000 people died across the country in the two quakes.

"The government has decided to extend permits for two years in order to compensate those climbers who could not continue their expeditions due to the earthquake," tourism department chief Gobinda Bahadur Karki was quoted as saying by AFP news agency.

Nepal is eager to boost its flagging tourism industry ahead of the climbing season which starts later this month.

A huge rescue operation was initiated on Everest in the aftermath of the avalanche. Photo: AFP

Hiking officials say foreign bookings have sharply declined.

Nepal's infrastructure was badly hit by the quakes, while a protracted transport blockade along the border with India has further hit supplies of fuel and equipment.