China is facing international criticism for not allowing its most prominent dissident, Liu Xiaobo, to be treated abroad for terminal liver cancer. <br/><br/>The activist, who had been serving an 11-year prison term for subversion, died in a hospital in China aged 61. <br/><br/>Amid tributes for the late campaigner, the Nobel Committee, which gave him the Peace Prize in 2010, said China bore a heavy responsibility for his death. Beijing is now being urged to free his wife, poet Liu Xia, from house arrest.<br/><br/>There has been no official response yet from the Chinese government, and there is a virtual media blackout in China regarding Mr Liu's death.