Indonesia's Mount Anak Krakatau erupted and forcing Jakarta's Soekarno-Hatta International Airport to suspend flights also halt school activities and stop fishing trips on Sunday.
The airport announced on Instagram that operations were suspended until 9:30 a.m. (0230 GMT) due to volcanic ash. This extended an earlier halt that was set to end at 5:30 a.m. The disruption affected 209 flights including international routes as Indonesia's transportation ministry said.
The volcano has been erupting since late Friday. Ash was detected at the airport early Sunday. According to meteorological agency BMKG the ash rose as high as 20,000 feet (6,000 metres) on the Java side while a plume reached 50,000 feet (15,000 metres) on the Sumatra side and parts of Banten province.
Anak Krakatau sits roughly between Java and Sumatra along Indonesia's Pacific "Ring of Fire" an area prone to earthquakes and volcanic activity.
Disaster agency BNPB spokesperson Berton Panjaitan urged the public to stay calm but alert. He advised wearing masks and eye protection also limiting outdoor activity with covering water sources and driving carefully due to reduced visibility from ash.
Schools cancelled activities Saturday after students and residents reported eye irritation. Fishermen also cancelled trips because of the eruption as local outlet Kompas reported.
Authorities said there is no immediate tsunami risk. However, a 2018 tsunami triggered by an Anak Krakatau eruption killed hundreds and injured many more across Java and Sumatra.
Anak Krakatau meaning "child of Krakatoa" formed a century ago from the site of Krakatoa's catastrophic 1883 eruption which killed over 36,000 people in a series of tsunamis.
