Mount Anak Krakatau has erupted again, prompting authorities to step up monitoring and measures as volcanic ash spreads across parts of Indonesia.

Mount Anak Krakatau has erupted since late on Friday, with volcanic ash disrupting hundreds of flights as Indonesia faces a string of natural disasters across the archipelago.

Indonesia suspended operations at Soekarno-Hatta International Airport after volcanic ash from Mount Anak Krakatoa disrupted airspace, affecting more than 22,000 passengers and…