A 30-year-old Yemeni adventurer known as “The Spider-Man of Yemen,” Al-Qaqa Ibn Antar, died after falling into a volcanic crater while climbing without safety equipment.

Antar lost his grip while scaling the steep walls of the Hardah Dam crater in southern Yemen and fell approximately 393 feet into the crater.

Rescue teams conducted a difficult four-hour operation before recovering his body from about 100 feet below the water’s surface.

Antar had gained a large social media following for posting videos of dangerous climbs and stunts performed without protective gear, Oregon Live has reported.

Following the accident, authorities urged climbers and adventure enthusiasts to use proper safety equipment and follow safety procedures to prevent similar tragedies.