It was unclear exactly what treatment Liu was receiving but as of 10 days ago his condition was stable, Mo said, citing Liu's family.
Liu a well-known advocate of democracy opposed the one party rule of the Communist Party.
Mr. Liu, a lecturer at Beijing Normal University, was a prominent figure during the student-led protests that swept Beijing and other Chinese cities in 1989.
"The Committee is delighted to learn that Liu Xiaobo is out of prison at long last".
Patrick Poon, a China researcher for Amnesty International, called on Chinese authorities to ensure that Liu receives adequate medical care and access to his family. "That is why I hope to be able to transcend my personal experiences as I look upon our nation's development and social change, to counter the regime's hostility with utmost good will, and to dispel hatred with love".
"But for a scholar, when he was imprisoned in prison, he could not write, could not speak, could not gain the freedom of thought, which must have been the greatest torture", she said.
Despite the domestic restrictions, Mr. Liu has occupied a central spot in the narrative of China's struggles to win global favour despite commanding a domestic regime whose governing practices many of its trading partners have criticized.
Diplomatic ties and trade talks between Beijing and Oslo were frozen after Liu was given the award, and Norway's salmon industry suffered as exports to China were halted. But the rising clout of the world's second-largest nation has made it increasingly hard for western nations to risk angering Beijing. China quickly froze relations with Norway (they were only normalized again this year) and heavily censored news about the award.
"The worldwide community can see that China has no human rights when even Nobel prize winners have been treated like this", Beijing-based lawyer Yu Wensheng said, adding that when Liu dies it will be "a heavy blow" for China's human rights movement.
As China's power and influence have increased, Western democracies have collectively engaged in self-censorship on human rights, choosing to prioritize what they have clearly believed to be their more important interests over their purported values.
Taiwanese human rights activist Lee, a former Democratic Progressive Party worker, has been detained on charges of pursuing activities harmful to China's national security - charges later upgraded to "subverting state power".
The news of his medical condition is prompting calls from his supporters asking for his permanent release and criticizing the Chinese government for detaining him in the first place. Two years later, she wept in a brief interview with The Associated Press, saying her treatment has been "absurd and unbelievable".
Mr. Nee called Mr. Liu's illness "obviously a tragic case". The 61-year-old laureate has been granted medical parole by the Chinese government.
"He can not go and receive medical treatment in a hospital overseas that is not within the prison administration system", Mo told VOA. The Chinese authorities have never explained why they restricted her movements.
Heavy censorship has kept many in China from following Mr. Liu's case.
As for his own fate, almost eight years before his Nobel award, Liu Xiaobo pointed to Russian physicist and Soviet dissident Andrei Sakharov - who received a Nobel Peace Prize in 1975 - as an example of the importance of individual responsibility in the fight for human rights.