Daring the military-backed government, supporters of deposed Egyptian President Mohammed Morsi have called for a "million person march" tomorrow against his ouster, even as police today arrested two top leaders of an Islamist party in a widening crackdown on protesters.
"We call for a million person march under the banner of 'Martyrs of the Coup' on Tuesday," the Anti-Coup Alliance of Islamist groups organising the protests said in a statement.
Also today, pro-Morsi Wasat Party head Abul Ela Mady and his deputy Essam Sultan were both arrested in Cairo for involvement in killing protesters in recent violence.
In the worst violence seen since 61-year-old Morsi was deposed by the army on July 3, 80 people were killed in clashes with the security forces on Saturday.
However, the Brotherhood's official website said at least 200 people had been killed and some 5,000 wounded.
Both men were arrested on charges of inciting violence, killing protesters and insulting Egypt's judiciary.
Mady and Sultan were arrested in the Moqattam district of the Egyptian capital, and were then sent to Aqrab prison, where nine Muslim Brotherhood leaders are being held, state-run MENA news agency reported.
Prosecutors also ordered the arrest of Safwat Hegazy, a preacher known for his ties with the Muslim Brotherhood, on charges of inciting violence, after he led a march from Rabea al-Adaweya sit-in to Nasr Road which degenerated into deadly clashes with security forces.
Meanwhile, as part of international efforts to broker a peace between the two sides, EU foreign policy chief Catherine Ashton arrived here today for talks.
She will meet leaders of Morsi's Muslim Brotherhood, head of the Egyptian armed forces Gen Fattah al-Sisi and interim President Adly Mansour.
In a statement, she said she would push for a "fully inclusive transition process, taking in all political groups, including the Muslim Brotherhood".
Egypt's interim president Adly Mansour yesterday issued a powder-keg decree making preparations for a possible "state of emergency," the EGYnews website reported.
According to informed sources, the defence and interior ministers, as well as the intelligence chief, informed Mansour of "serious threats of terrorist attacks against state institutions".
Military helicopters dropped leaflets on pro-Morsi protesters in Rabaa al-Adawiya earlier today and appealed to them not to approach military installations and units. "We call on everyone to cooperate and respond to the instructions of the armed forces personnel in order for the security and stability of the country. No violence. Do not sabotage. No bloodshed," the leaflets read.
In a further warning,