National Disaster Mitigation Agency spokesperson Raditya Jati said floods brought by intense rains caused floodwaters as high as 3 metres.

Malaysian authorities say a military helicopter crashed into a school in a rural area on Borneo island, injuring at least 22 people including students.

An Indonesia National Search and Rescue spokesman says several pieces of debris have been spotted floating in the sea off Borneo island, possibly linked to the missing AirAsia jetliner.