Key red-shirt leader and rogue army officer Maj-Gen Khattiya Sawasdipol, who was shot in the head immediately after giving an interview to foreign reporters on Thursday night, died on Monday morning.
Dr Chaiwan Charoenchokthawee, director of Vajira Hospital, said Maj-Gen Khattiya, better known as Seh Daeng, was pronounced dead at 9.20am.
Seh Daeng sufferred an acute kidney failure, causing all other organs to stop functioning. Doctors were unable to detect a pulse so they tried to stimulate his heart for about five minutes, but without success, he said.
Seh Daeng, 58, was shortly after troops began the operation to seal off the Ratchaprasong rally site on Thursday afternoon.
Read more: Bangkok Post