Volcano expert and guide survive falling into active Nicaraguan crater

Pair suffer from dehydration due to high temperatures

Rodolfo Alvarez and Adriac Valladares fell into the crater of the Masaya Volcano after their rope broke (INTI OCON/AFP/Getty Images)

A volcanologist and his guide survived falling into an active volcano in Nicaragua after they were rescued by firemen.

Argentinian Rodolfo Alvarez, 60, fell into the crater of the Masaya Volcano along with his Nicaraguan guide Adriac Valladares, 25, after their rope broke.

They reportedly suffered from dehydration because of the high temperatures inside the crater.

The pair were rescued by firemen, who used ropes and harnesses to climb down and save them.

The government said both men were in "good condition and stable".

Masaya Volcano, which sits 12 miles south of Managua, has a lava lake and last erupted with lava in 1772.

In 2001, the crater exploded, sending rocks up to 500m from the crater, injuring one visitor.