Former Egyptian President Hosni Mubarak is "slipping in and out of consciousness" the Associated Press have reported.
Mubarak was transferred to a hospital inside Tora prison in Cairo on 2 June. The 84-year-old is reported to be suffering from a range of illness including a heart condition.
On Saturday, Egypt's state-run media reported that the former president could have a stroke 'at any time'.
Mubarak has been sentenced to life imprisonment
He is currently serving a life sentence for failing to stop the killing of protestors during Egypt's uprising, during which he was deposed.
During the trial, the former dictator appeared in court in a metal cage, looking frail lying on a hospital stretcher.
Following the verdict, there was violence in the courtroom as Mubarak supporters scuffled with members of the opposition.
There were massive protests in Egypt's Tahrir Square earlier this week, amid widespread outrage that no one was convicted of killing more than 850 people when security forces opened fire on crowds during the uprising.
Mubarak was toppled from power as part of the uprisings that spread throughout the Arab world in 2011. He had ruled Egypt for more than 30 years.