SQ released the following statement on FB:

Singapore Airlines flight #SQ321, operating from London (Heathrow) to Singapore on 21 May 2024, encountered severe turbulence en-route. The aircraft diverted to Bangkok and landed at 1545hrs local time. We can confirm that there are injuries and one fatality on board the Boeing 777-300ER. There were a total of 211 passengers and 18 crew on board. Singapore Airlines offers its deepest condolences to the family of the deceased. Our priority is to provide all possible assistance to all passengers and crew on board the aircraft. We are working with the local authorities in Thailand to provide the necessary medical assistance, and sending a team to Bangkok to provide any additional assistance needed. We will provide regular updates on our Facebook and X accounts