Preliminary data based on the notification from the authorities of Malaysia
During cruise at FL390, aircraft encountered severe turbulence. Autopilot and AutoThrust disconnected and Captain took over control. Subsequently, a PAN call was made to Ho Chi Minh control due to the strong updraft encountered. As aircraft recovered, pilots requested climb back to FL390. Pilots were directed to point MAPNO and the PAN call was cancelled. Captain was informed by Purser that five passengers were reported injured during the event. Cabin Crew managed to page for medical personnel onboard to attend to the injured passengers.