An Egyptian court has sentenced ousted president Mohammed Morsi to death over a mass prison break in 2011.

The former leader has already been sentenced to 20 years in jail for ordering the arrest and torture of protesters during his time in power.

The country's religious authorities will now have to give their opinion before the sentence can be carried out.

Morsi was deposed by the military in July 2013 following mass street protests against his rule.

Since then, the authorities have banned his Muslim Brotherhood movement and arrested thousands of his supporters.

Morsi was among more than 100 other defendants to be sentenced to death for their involvement in mass jail breaks during the 2011 uprising against Egypt's then-president, Hosni Mubarak.

All death sentences must first be sent to the Grand Mufti, Egypt's highest religious authority, for his opinion on whether they should stand.

Convictions are still open to appeal, even if the Grand Mufti gives his approval.

Morsi's supporters have said that the cases against him are politically motivated and attempts to give legal cover to a coup, while Morsi has rejected the authority of the courts.

Morsi was Egypt's first freely elected president, but protests began building less than a year into his rule when he issued a decree granting himself far-reaching powers.

In May 2014, Morsi's successor, former military chief Abdul Fattah al-Sisi, secured a landslide victory in presidential elections which had a turnout of 46%.