Mubarak, 86, toppled in a 2011 popular uprising, was sentenced to three years in prison last May and his two sons were given four-year jail terms in the same case.
An Egyptian court last week ordered the release of Alaa and Gamal Mubarak pending a retrial.
The death toll in pro-democracy protests in Egypt on Sunday climbed to 11, security sources said. Tight security in Cairo and other cities failed to contain protests marking the anniversary of the 2011 uprising that toppled autocrat Hosni Mubarak.
Several hundred demonstrators gather in Manhattan to protest Egypt's president Sisi on fourth anniversary of Jan. 25 Revolution.
Photographs on Twitter showed members of Egypt's security forces with black masks standing in the area where the woman, liberal activist Shaimaa Sabbagh, was shot.
Lawyer Farid el-Deeb said the order for the release of Alaa and Gamal Mubarak should mean they immediately walk free.
Protesters had chanted slogans against Egypt's military-backed authorities and President Abdel-Fattah al-Sisi.
Now that a retrial has been ordered, judicial sources say Mubarak could walk free as no convictions remain against him.
Egypt's highest appellate court accepted the prosecution's appeal of a court verdict against former information minister Anas al-Fiqqi and ordered the retrial of the case.
The presidency said that al-Sisi had ordered the cabinet to reconsider Egypt's Criminal Law, a move recommended by the Mubarak trial judge on Saturday
Citing unnamed medical sources, local media claimed Saturday that Mubarak had slipped in a coma
Egyptian security forces stepped up security on Saturday ahead of the verdict in the murder trial of former president Hosni Mubarak and top security officials.
The course of Egypt's transition has raised concerns that the most populous Arab nation will fail to build state institutions free from corruption and nepotism that can deliver political stability and economic growth.
Mubarak denied in court on Wednesday ordering the killing of protesters during the 2011 uprising
Ahmed Ezz, a steel tycoon, is seen as the symbol of corruption during the era of ousted dictator Hosni Mubarak
Cairo's court of urgent matters overturned a May ruling banning former members of the NDP – dissolved in the wake of Mubarak's 2011 ouster – from running in either presidential elections.
Mubarak, 86, fractured the top of his left thigh bone, a source said.
Al-Adly had been accused of illegal profiteering and of laundering some 5 million Egyptian pounds, while sources say Sisi is considering granting an amnesty to a number of prisoners who were not involved in rioting or acts of violence, including some political activists
On July 3 last year, Abdel-Fattah al-Sisi took advantage of mass demonstrations against Morsi's rule, which was plagued with economic problems, and carried out a military coup on the government.
An Egyptian court has sentenced former dictator Hosni Mubarak for three years in prison after finding him guilty of corruption charges.
Mainly made up of young political activists, April 6 was at the forefront of the January 25 uprising that ended the autocracy of longstanding president Hosni Mubarak in 2011.