A missing AirAsia plane carrying 162 people is presumed to have crashed off the Indonesian coast, an official said on Monday, as countries in the region offered to help Jakarta in the search and recovery effort.

The Indonesia AirAsia plane, an Airbus A320-200, disappeared after its pilot failed to get permission to alter course to avoid bad weather during a flight from the Indonesian city of Surabaya to Singapore on Sunday.

Flight QZ8501 did not issue a distress signal and disappeared over the Java Sea five minutes after requesting a change of course.