Jakarta: Indonesia has evacuated hundreds of climbers and villagers after Mount Semeru in East Java erupted several times on Wednesday, sending hot ash, rocks and gas down its slopes and covering nearby communities in thick volcanic dust.

Authorities said the volcano erupted around ten times, pushing ash clouds high into the sky and triggering hot flows that travelled up to thirteen kilometers from the crater. The country’s disaster agency raised the alert level to the highest stage and widened the exclusion zone to eight kilometers, warning residents to stay away from rivers that could carry fast-moving volcanic material.

More than 900 people living near the mountain were moved to temporary shelters, including schools and community halls. Many were seen leaving their homes with only small bags, worried about further eruptions. Officials distributed masks as ash continued to fall over several villages in Lumajang district.

A major concern on Wednesday was the safety of nearly 180 climbers who had been stranded near the popular Ranu Kumbolo lake, about 6.4 kilometers from the crater. Rescue teams reached the group by evening and began guiding them down the mountain. Local authorities later confirmed that all the climbers were safe and being brought to evacuation centers.

Mount Semeru is one of Indonesia’s most active volcanoes and has erupted many times in recent years. Officials warned that more eruptions are possible and that people should follow instructions from emergency teams.

Aviation authorities also issued warnings as ash clouds from Semeru moved across parts of East Java, raising the possibility of flight delays.

Rescue and monitoring efforts are continuing, and officials said their main focus is keeping residents safe while watching for further volcanic activity.