The trial of ousted Egyptian president Mohamed Morsi was due to resume Wednesday, but has been postponed until February 1 because bad weather prevented him from being brought to court.
The trial is taking place at a police academy in Cairo, but Morsi is being held 175 kilometers away in Alexandria, where Wednesday's fog kept the helicopter that was to take him to the academy grounded.
The trial's initial session in November lasted just minutes after Morsi rejected the proceedings and insisted that he was Egypt's legitimate president.
Egypt's army removed him from power in July after opposition protests accusing him of trying to monopolize power. Authorities have since spent months cracking down on his Muslim Brotherhood, including arresting many of its leaders and declaring it a terrorist group.
More than 1,000 people, mainly pro-Morsi Islamists, have been killed in the crackdown, but protests continue.
The trial comes as Egypt begins a referendum on a new constitution. Egyptians living abroad are able to cast their ballots Wednesday through Sunday, while the voting in Egypt is set to take place next week. Elections for a new president and parliament are planned for later this year.