Former Egyptian President Hosni Mubarak is being treated in the hospital after he fell in a prison toilet and hit his head, according to the BBC citing state media.
Mena news agency reported he also bruised his chest, BBC said.
CNN reported the 84-year-old is serving a life sentence in Cairo's Tora prison for not preventing the killing of demonstrators during Egypt's recent uprising.
Mubarak's long-time rule ended in February 2011, he was sentenced last June.
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Deputy interior minister Gen. Mohammed Ibrahim told the BBC Mubarak was expected to go back to prison on Wednesday.
CNN said Mubarak has suffering a number of health problems, including a coma, since his conviction.