Indonesia's Mount Semeru volcano has erupted, sending ash billowing into the sky and sparking evacuations on the country's main island, Java.
Authorities raised the volcano's warning status to the highest level, meaning its activity had escalated. No injuries have been reported but nearly 2,000 people were evacuated from the area around the
volcano.
Indonesia sits on the Pacific "Ring of Fire" where tectonic plates collide, causing frequent volcanic activity as well as earthquakes.
Semeru - also known as "The Great Mountain" - is the highest volcano in Java at 3,676 meter (12,060ft) and one of the most active.