It is unlikely any climbers were attempting to climb Mount Everest when a 7.3-magnitude earthquake rocked Nepal Tuesday morning, the head of one of the country's main climbing groups told NBC News.

Rescue helicopters airlifted badly-injured climbers off Mount Everest on Sunday, a day after an earthquake-triggered avalanche killed at least 17 people, NBC News reported. Choppers arrived on Sunday ...

Five foreign climbers and two Nepali guides were killed when an avalanche struck Mount Yalung Ri as rescue teams are facing rough terrain and poor weather.