An Egyptian court granted Alaa and Gamal Mubarak release pending trial in the "presidential palaces case" Thursday, signaling a possible complete release as they are not detained pending other trials.
Lawyer Farid El-Deeb said his defendants are expected to leave prison later Thursday, Al-Ahram Arabic news website reported.
The court ordered their release pending the "presidential palaces" case, as they have completed the maximum period for detention pending trial which is 18 months.
A source at the general-prosecution told Al-Ahram Arabic news website that the prosecution is yet to review their period in detention and court orders before any release.
Ousted president Hosni Mubarak, his two sons, and four others, were convicted in May 2014 of embezzling LE125 million ($17.9 million) originally allocated for developing communications centres at the presidency, diverted in order to develop private buildings.
The former president received a three-year prison sentence and his sons four-year sentences. However, they appealed the sentences and are currently on retrial.
Alaa and Gamal still face trial in a case where they, and others, face charges of corrupt stock exchange dealings.
However, they were ordered released pending this trial in June 2013.
They were also acquitted, along with former prime minister and ex-presidential candidate Ahmed Shafiq, of embezzling public funds in the Pilots' Association for Land Development case in December 2013.
Last November, a court ruled that the statute of limitations had expired on charges against Mubarak, his two sons and businessman Hussein Salem of profiteering from illegal gifts of villas.
The two sons of the ex-autocrat, who ruled Egypt for almost 30 years, were put on trial in the wake of the January 2011 uprising that led to the fall of Mubarak's regime.
Mubarak himself had charges of complicity in the killing of protesters of the 2011 uprising dropped last November, sparking protests in Tahrir Square, where millions chanted against him three and a half years earlier.