Student protests at Egypt's al-Azhar challenge army

CAIRO (Reuters) - Thousands of students from Egypt's al-Azhar University staged a third day of protests on Monday, security sources said, in one of the boldest challenges to the army since it toppled Islamist President Mohamed Mursi in July.

The demonstrations demanding Mursi's reinstatement are a delicate matter for the authorities because the administration at al-Azhar, the ancient seat of Sunni Muslim learning, has historically toed the government line.