New Delhi, Dec. 25 -- Humanitarian medical flight carrying burn patients loses contact before plunging into Galveston Bay, leaving only two survivors in harrowing rescue operation.

A Mexican Navy aircraft carrying critically ill burn patients plunged into the frigid waters of Galveston Bay on Monday afternoon, claiming six lives in a tragedy that transformed a humanitarian mission into a desperate rescue operation. The medical flight, operated in partnership with the nonprofit Michou y Mau Foundation, lost communication with air traffic control approximately ten minutes before crashing just west of the Galveston Causeway as dense fog enveloped the Texas coastline.

The twin-engine aircraft carried eight people, four Mexican Navy personne...