A rare direct flight from Pyongyang landed in Singapore on Saturday ahead of the expected arrival of North Korea's leader Kim Jong Un for a summit with US President Donald Trump to discuss ending the North's isolation and its nuclear programme.
The arrival of the Air China Airbus 330 flight at Changi airport raised speculation that a delegation of North Korean officials joined an advance team headed by Kim's close aide, Kim Chang Son, who was in Singapore to prepare for the talks.
North Korean leader Kim is expected to arrive at Changi airport on Sunday, a source involved in the planning of the trip told Reuters on Friday.
There was heightened security at the St. Regis hotel in central Singapore, one of the hotels where the leaders were expected to stay.