Indonesian officials have warned people to stay more than a mile (two kilometers) from two craters on a smoking volcano spewing noxious gas.
Government volcanologist Surono says visitors and villagers have been told to stay away from the yellow craters on the 2,665-meter (8,743-foot) Mount Papandayan. The craters are tourist attractions but are now emiting dangerous hydrogen sulfide and carbon monoxide gases.
Surono said Sunday that authorities raised the volcano's alert to the second-highest level.
Papandayan in West Java province is one of Indonesia's most popular peaks to climb. It last erupted in 2002.