CAIRO (Reuters) - The Egyptian judge who is due to be sworn in as interim president on Thursday took his oath of office as head of the constitutional court.

Adli Mansour, who will replace Mohamed Mursi as president, had yet to be sworn in as head of the Supreme Constitutional Court. He will become head of state under an army transition plan.

(Writing by Tom Perry/Asma Alsharif; Editing by Mike Collett-White)