Indonesia suspended flights at Soekarno-Hatta International Airport in Jakarta and Radin Inten II International Airport in Lampung on Sunday after volcanic ash from Mount Anak Krakatau spread across Java and Sumatra. State-owned airport operator In Journey Airports announced the shutdown via social media, extending Jakarta's closure until 9:30 a.m. local time from an initial 1:30 a.m. to 5:30 a.m. window. Lampung's airport halted operations until 8 a.m. The volcano, located in the Sunda Strait between Java and Sumatra, has been active since early July, with eruptions intensifying Friday night.

Ash was detected over Jakarta, Banten, West Java, Lampung, and Bengkulu as of 7 a.m. Sunday. A flank collapse at Anak Krakatau likely triggered a deadly 2018 tsunami that killed over 400 people and injured more than 1,000 in Lampung and Banten.