Former Egyptian President Hosni Mubarak's retrial for the killing of nearly 900 protesters during the revolution that ended his dictatorial regime is set to begin tomorrow in the deeply polarised country.

84-year-old Mubarak, his interior minister Habib al-Adly and six security chiefs will face trial for the killing of protesters during the January 25 revolution.

His earlier trial ended in early June 2012, where Mubarak was sentenced to 25 years in prison, the maximum amount of jail time in Egypt.

Mubarak challenged the ruling, and the courts granted him a retrial. According to Mubarak's defense team, he should be released on April 14 if new charges are not issued against him.