Hong Kong's leaders oversaw a ceremony on Saturday to mourn the at least 128 people killed in a high-rise apartment complex fire, a toll that is likely to rise further with 200 others still unaccounted for days after the tragedy.

President Volodymyr Zelenskiy's powerful chief of staff Andriy Yermak, a close ally who has headed Ukraine's negotiation team at fraught US-backed peace talks, has quit, hours after anti-corruption agents searched his home.

The death toll from floods across large swathes of Southeast Asia rose to at least 161 on Friday.

US President Donald Trump says a National Guard member has died after being shot in an ambush by an Afghan national - an attack he blamed on Biden-era immigration vetting failures.

Hong Kong fire authorities say they expect to wrap up operations after the city's worst fire in nearly 80 years tore through a massive apartment complex, killing at least 94 people.

Police in Melbourne will have the power to stop and search people without warrants in designated areas as part of a push to improve safety.