More bodies found after sudden eruption of Indonesia's Mount Marapi, raising confirmed toll to 22

The bodies of two climbers were located on Monday and nine more on Tuesday, the National Search and Rescue Agency said.

One climber remained missing and was presumed dead because of being very close to the eruption site, said Edi Mardianto, the deputy police chief in West Sumatra province.

The rescuers contended with bad weather and difficult terrain, along with winds that brought heat from the eruptions.

Sixteen bodies had been taken to a hospital for identification by late Tuesday, as more than 200 rescuers, including police and soldiers, struggled to bring the others down the mountain and search for the missing climber, Malik said.

Marapi has stayed at the third highest of four alert levels since 2011, indicating above-normal volcanic activity under which climbers and villagers must stay more than 3 kilometers (1.8 miles) from the peak, according to Indonesia's Center for Volcanology and Geological Disaster Mitigation.

Officially, climbers were only allowed below the danger zone and had to register at two command posts or online. However, local officials acknowledge that many people may have climbed higher than permitted and villagers may also have been in the area, making the number of people stranded by the eruption difficult to confirm.

Marapi spewed thick columns of ash as high as 3,000 meters (9,800 feet) in Sunday's eruption and hot ash clouds spread for several kilometers (miles). Nearby villages and towns were blanketed by tons of volcanic debris that blocked sunlight, and authorities recommended that people wear masks to protect themselves from the ash.

About 1,400 people live on Marapi's slopes in Rubai and Gobah Cumantiang, the nearest villages, about 5 to 6 kilometers (3 to 3.7 miles) from the peak.

Marapi is known for sudden eruptions that are difficult to predict because the source is shallow and near the peak, and its eruptions are not caused by a deep movement of magma, which sets off tremors that register on seismic monitors.

Marapi has been active since a January eruption that caused no casualties. It is among more than 120 active volcanoes in Indonesia, which is prone to seismic upheaval due to its location on the Pacific "Ring of Fire," an arc of volcanoes and fault lines encircling the Pacific Basin.