A Labrador named Max has been hailed as a hero after coming to the rescue of a teenage boy who got lost during an expedition in Mexico's Sierra Madre Oriental mountain range.

Juan Heriberto Trevino, 14, was on a summer camp trip last Sunday when he became separated from his group.

The boy, from Galeana in north east Mexico, was searching for firewood when he slipped down a ravine and, in his disorientation, couldn’t find his way back to camp.