Indonesias Semeru volcano has erupted

Indonesias Semeru volcano has erupted, unleashing fast-moving pyroclastic flows as the countrys volcanology agency increased the alert level of Java islands tallest mountain to the highest. The volcano spewed ash clouds as tall as 5.6km (3.48 miles) into the sky, the agency said on Wednesday, adding that residents should stay a 2.5km (1.55-mile) distance away due to risks.