Overnight, gunmen in a car fired at a group of police outside the capital's Al-Azhar university, killing three and wounding nine. The attack came as pro-Morsi students protested at the university.
Student backers of Morsi have staged regular demonstrations on campuses as a police crackdown has weakened their ability to hold large street protests.
Morsi was overthrown by former army chief Abdel Fattah al-Sisi in July last year after massive protests demanding the Islamist leader's resignation.
Sisi is now standing for president in the May 26-27 election which he is expected to win easily.
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Student backers of Morsi have staged regular demonstrations on campuses as a police crackdown has weakened their ability to hold large street protests.
Morsi was overthrown by former army chief Abdel Fattah al-Sisi in July last year after massive protests demanding the Islamist leader's resignation.
Sisi is now standing for president in the May 26-27 election which he is expected to win easily.
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