Egypt’s ousted former President Mohammed Morsi is reported to have arrived at a court venue in Cairo where he is due to go on trial.
He and 14 other Muslim Brotherhood figures face charges of inciting the killing of protesters in clashes outside the presidential palace.
Security services are on high alert after supporters of the former president called for major protests.
Mr Morsi was ousted by the military in July after protests against his rule.
State TV said he arrived at the courtroom, believed to be at the Police Academy in Cairo, with other key Brotherhood figures, Essam el-Erian, Mohammed al-Beltagi and Ahmed Abdel Aati.
Although Mr Morsi won the presidency in a democratic election, during his 13 months in power he fell out with key institutions.
After he was ousted, a sit-in protest in Cairo by Mr Morsi’s supporters was violently broken up by the military, leading to the deaths of hundreds of people.
The interim government has also cracked down on the Muslim Brotherhood, from which Mr Morsi hails, banning the Islamist organisation and arresting dozens of senior figures.
His supporters say he was removed in a coup and is now facing a politicised trial. Human rights groups accuse the security services of acting without accountability.