Rescuers on Saturday recovered the body of an Indonesian woman who was caught in a volcanic eruption at Mount Dukono on Indonesia's remote island of Halmahera a day earlier, as search operations continued to find the bodies of two Singaporeans, officials said.

The slain hikers were among 20 who set out to ascend the 1,355-metre (4,445-foot) volcano in defiance of safety restrictions and became stranded when Dukono erupted early Friday, spewing a thick ash column that rose about 10 kilometres (6 miles) into the air.

The woman, identified by authorities only as Enjel and known as a local hiker, was located Saturday afternoon, about 50 metres (165 feet) from the rim of the main crater, said Iwan Ramdani, who heads local Search and Rescue Office.

The location of the bodies of two Singaporean climbers remains unknown, and rescue teams are continuing operations amid high volcanic activity, he said.

"The rescue efforts went through a situation that required careful calculation and a well-planned evacuation strategy," Mr Ramdani said, "We took into account the potential escalation of volcanic activity as well as the safety of all personnel."

Hours after the eruption, 17 climbers had been safely evacuated, including seven Singaporean nationals and two Indonesians who eventually joined the rescue operation and provided information on climbing routes of the victims before the eruption. Ten of those evacuated suffered minor burn injuries.

The search operation that involved more than 100 personnel supported by drones resumed early Saturday, focusing on a 700 square-metre (7,500 square-foot) area where clues were found during earlier searches, despite hazardous terrain and continuing eruptions, according to Mr Ramdani. He said rescuers were prioritising safety because Dukono’s volcanic activity remains elevated.

The volatile nature of the volcano presents significant obstacles. "The main challenge in this search effort is that we are racing against ongoing eruptions," Mr Ramdani said in a video statement.

"When the authorities declare conditions safe, we move closer to the crater area, but when an eruption occurs, we must immediately secure all search personnel from potential danger."

The volcano's continued activity underscores the perilous conditions. Indonesia’s volcanology agency reported multiple eruptions from early Saturday through late morning, with ash columns as high as 3,000 metres (nearly 10,000 feet) above the crater. Lava bursts were also observed overnight from a monitoring post near the volcano.

The dangers of Mount Dukono are well-established. The volcano has been on the second-highest alert level since 2008, with authorities enforcing a four-kilometre (2.5-mile) exclusion zone around the active crater since December 2024.

Local authorities formally closed all hiking routes to Mount Dukono in April and reinforced the ban following Friday’s incident. The National Disaster Management Agency warned that entering restricted zones could result in legal sanctions.

The agency urged climbers and tour operators to comply with safety recommendations, noting that similar restrictions apply to dozens of other active volcanoes across the country currently at elevated alert levels.

Indonesia, an archipelago nation of more than 270 million people, sits along the Pacific "Ring of Fire" and is home to more than 120 active volcanoes.