Indonesia's Mount Merapi has erupted twice, shooting ash plumes as high as 6 kilometres in the sky and forcing the closure of two airports.
The National Disaster Mitigation Agency said the volcano's alert status, raised last month from the lowest level, was unchanged and a 3km no-go zone around the crater remains in force.
It said the first eruption occurred at 8.20am on Friday and lasted two minutes. Merapi erupted again in the evening, spewing volcanic ash as high as 2.4km, the local volcanology agency said.
Materials unleashed by the first eruption were blown northward, forcing the temporary closure of Ahmad Yani International airport in the Central Java capital of Semarang and Ade Sumarno Airport in Solo, officials said.
The mountain is about 30km from Yogyakarta city on the densely populated island of Java.
About a quarter million people live within a 10km radius of the volcano.
Merapi's last major eruption in 2010 killed 347 people.
