Not less than one particular person died and a number of others have been injured after a airplane encountered extreme turbulence on a flight between London and Singapore, Singapore Airways mentioned on Tuesday.

The airplane, a Boeing 777-300ER, diverted to Bangkok, the airline mentioned in an announcement on social media, and landed at 3:45 p.m. native time on Tuesday.

The flight, which had 211 passengers and 18 crew members on board, had left Heathrow Airport on Monday. The typical flight time of that route is just below 13 hours.

The flight, SQ321, took off from London Heathrow at 10:38 p.m. native time on Monday. Knowledge on Flight Radar 24, a web site that compiles public details about flights, appears to show that about 11 hours later, it went from cruising at 37,000 ft to roughly 31,000 ft in just a few minutes.