The former Khmer Rouge army chief who is facing trial for crimes against humanity is in a "hopeless" condition in a coma, his relatives have said.
Ta Mok did not speak or open his eyes when visited
Ta Mok, 80, known as "The Butcher", is accused of a leading role in one of the worst genocides of the 20th Century as part of Cambodia's Pol Pot regime.
The one-legged ex-commander is one of only two surviving former Khmer Rouge leaders being held in detention.
His lawyer said he "could die tonight, tomorrow or next week".
Ta Mok, whose real name is Ung Choeun, ousted Pol Pot in 1997, becoming the group's final leader before being arrested in March 1999.
His daughter, Prek Lim, 50, said she had been allowed a six-minute visit with four other relatives to the military hospital where her father is being held.
"When I saw him sleeping, hooked up to oxygen and unable to move from his bed. I felt very hopeless," said Ms Prek Lim.
She said he did not speak or open his eyes.
"He was not even aware that relatives had come to see him."
Ta Mok's niece Ven Dara said: "I am so hopeless for his condition right now. He is in a coma."
Ta Mok was hospitalised on 29 June with heart, lung and respiratory problems.
Ta Mok and Kaing Khek Iev, known as Duch, who headed the Khmer Rouge's notorious S-21 prison, are the only leaders being held.
The Pol Pot regime saw up to two million people executed or starved or overworked to death between 1975 and 1979.
This month, officials were sworn in for long-awaited UN-backed genocide trials.
Many fear most of the defendants will die before being brought to trial.