At least 11 climbers were found dead in Indonesia on Monday as a result of the Mount Marapi volcano explosion in West Sumatra, according to a rescue official.
Meanwhile, the search for the 12 missing climbers has been temporarily halted owing to safety concerns.
According to Jodi Haryawan, a spokesperson for the search and rescue team, three survivors and the remains of 11 climbers—among the 75 individuals in the area at the time of the eruption on Sunday—were recovered on Monday.
The 2,891-metre (9,485-foot) tall volcano erupted on Sunday, spewing ash up to 3 kilometers into the sky.
Due to a large cloud of volcanic ash and ash-covered vehicles and highways, officials issued a second-highest level alert and prohibited residents from being within 3 km of a crater.
The search was halted on Monday due to a minor explosion, according to Jodi.
"It's too dangerous if we continue searching now," he added.
He said 49 climbers were removed from the region early Monday, and several were being treated for burns.
Mount Marapi is one of Sumatra Island's most active volcanoes, and its most catastrophic explosion occurred in April 1979, killing 60 people, according to Reuters.
This year, it erupted in January and February, spewing ash 75–1,000 meters from the summit.
According to the volcanology department, Indonesia is located on the Pacific's so-called "Ring of Fire" and has 127 active volcanoes.