Over 100,000 people living on the slopes of Mount Kelut in East Java, Indonesia, were evacuated earlier this week amid warnings of an eruption.
Many people ignored warnings to leave the area, particularly farmers who wanted to tend their crops.
Protective masks were issued after five people were taken to hospital as a result of breathing poisonous gas that was seeping out of the ground.
Officials have been keeping a close watch on the volcano, which last erupted in 1990.
Friday prayers took place as normal in Blitar, with the area on high alert.
On Saturday, soldiers were deployed to ensure that people moved out of the danger zone.
Makeshift tents were set to accommodate some of those who had been obliged to leave their homes.
Police have set up roadblocks to prevent people from returning to homes near Mount Kelut.