Two sons of ousted Egyptian president Hosni Mubarak have been released from prison, nearly four years after they were first arrested along with their father, security officials have said, according to The Independent.

The officials said the pair - wealthy businessman Alaa and Mubarak's one-time heir-apparent Gamal - walked free from Torah Prison in a suburb of southern Cairo shortly after daybreak today and were believed to have headed to their respective homes in the capital.

The two men, along with their father, still face a retrial on corruption charges and separately face trial over insider trading. They had been acquitted of other charges.

Mubarak stepped down in February 2011 in the face of a popular uprising. He and his two sons were arrested in April that year.