A US safety board has concluded that a Boeing 737 that crashed in southern China in 2022, killing all 132 people on board, went down after its fuel supply was deliberately shut off mid-flight. The US National Transportation Safety Board (NTSB) found that fuel switches on both engines of China Eastern flight MU5735 were moved to the "cut-off" position while the aircraft cruised at roughly 8,800 metres, causing engine speeds to drop before the plane plunged into a hillside near Guangzhou. China has yet to publish a final accident report, citing national security concerns, and has not confirmed whether the act was intentional, though the new findings — released under a freedom-of-information request — lend weight to long-standing speculation that someone in the cockpit caused the country's deadliest air disaster in decades.