Liu, 61, was jailed for 11 years in 2009 for "inciting subversion of state power" after he helped write a petition known as "Charter 08" calling for sweeping political reforms in China.
In December 2010, Liu was awarded the Nobel Peace Prize for his activism promoting human rights in China, causing Beijing to freeze diplomatic ties with Norway. China and Norway normalised ties in December last year.
Mo Shaoping, Lius lawyer, told Reuters that Liu was being treated for late-stage liver cancer in Shenyang and that medical parole had been approved. He did not elaborate.
The prison bureau of Liaoning province, where Shenyang is located, confirmed the medical parole in a short statement on its website, adding that Liu was being treated by eight people it described as "well-known tumour experts".
The public security ministry and justice ministry did not immediately respond to faxed requests for comment.
A man who answered the telephone at the Shenyang hospital where Liu is being treated said he could not check information on individual cases as there were too many patients there.
Tibetan writer and family friend Tsering Woeser said she had been in tears after reading online reports of Lius illness.
"Im shocked and deeply saddened," she told Reuters. "All we can do now is pray for him."
Liu Xia, Lius wife, who has been under effective house arrest since her husband won the Nobel Peace Prize, is suffering from depression but has been allowed to visit him in prison about once a month, a source close to the dissident told Reuters.
Liu was not allowed to attend his father-in-laws funeral last year and his mother-in-laws funeral this year, said the source who asked not to be identified.
Liu had been incarcerated at Jinzhou Penitentiary in Liaoning, his home province in northeast China, before being moved to the hospital for treatment.
Incredibly sad
In Oslo, the five-member Norwegian Nobel Committee which awards the peace prize strongly criticised Beijing.
"The committee is pleased that Liu Xiaobo is out of prison, but at the same time regrets in the strongest terms that it took a serious illness before the Chinese authorities agreed to release him," it said in a rare statement.
"He was in reality sentenced for exercising his freedom of expression and should never have been jailed," it added, reiterating a standing invitation for Liu to come to Norway.
Rights group Amnesty International also confirmed the news of Lius illness. Patrick Poon, a China researcher for Amnesty, said on Twitter that the diagnosis was made on May 23.
William Nee, also of Amnesty, said authorities should ensure Liu was getting adequate medical care and he called for the immediate and unconditional release of Liu and his wife.
"Obviously, its a shameful situation and its incredibly sad to see one of Chinas most prominent intellectuals suffer from such a terrible illness when he never shouldve been detained in the first place," Nee said.
He also called for the Nobel Committee and the international community to speak up "forcefully" for Liu now, Reuters reported.
(T.M016)
Editor: Suryanto
Copyright © ANTARA 2017
