At least three hikers were killed when one of Indonesia’s most active volcanoes erupted on Friday, spewing ash miles into the air, officials said.

Authorities are working to rescue 20 hikers after a volcanic eruption in Indonesia.

Mount Dukono, located in North Maluku province, erupted on Friday at ​07:41 a.m. local time (1041 GMT Thursday), spewing volcanic ash as high as 10 km (6.21 miles) into the sky, the country's volcanol...