Supporters of the ousted former Egyptian president Mohammed Morsi insisted tonight that they will remain in the streets despite the recent clashes that left at least 83 of the Muslim Brotherhood followers dead.
Muslim Brotherhood supporters have begun marching towards the military intelligence headquarters in Cairo, a spokesman has told Reuters, ignoring army warning to stay away.
Brotherhood spokesman Murad Ali said the marchers had set off from the Rabaa al-Adawiya mosque in northern Cairo, near where at least 72 were shot dead by security forces on Saturday.
The army, saying it was aware of the planned march, had issued a statement urging protesters "not to come close to military facilities in general, and the headquarters of military intelligence specifically."
Supporters of Egypt's Muslim Brotherhood remain defiant in Cairo and insist they will not leave the streets despite "massacres" by security forces who shot dozens of them on Saturday.
Egypt's ambulance service has said 72 people were killed in the violence at a vigil of supporters of deposed President Mohamed Morsi.
Earlier today, prayers were offered for the victims and flowers left near a campsite at Rabaa Adawiya Square, in Nasr city area.
Supporters of Egypt's deposed President Mohammed Morsi continued their sit-in protest today, as the interior minister warned they will soon be dispersed.
Muslim Brotherhood spokesman Gehad El-Haddad said the protesters would remain by the Rabaa al-Adaweya mosque in northern Cairo until their demands are met and Morsi was reinstated.
He accused Egyptian army chief, General Abdel Fattah al-Sisi, of issuing a "clear, pre-determined order to kill."
At least 15 people have been hurt in clashes in the Suez Canal city of Port Said this morning.
Supporters and opponents of the ousted Islamist president Mohammed Morsi fired birdshot at each other before soldiers intervened, security sources said.
Many of the at least 74 pro-Morsi protesters killed in clashes with Egypt’s riot police and plain clothed men who stood alongside were shot in the head or chest, Human Rights Watch reported.
The charity claims that medical staff judged some of the deaths to be targeted killings because the position of the shots would likely result in death.
Nadim Houry, deputy Middle East and North Africa director at Human Rights Watch said: “It is almost impossible to imagine that so many killings would take place without an intention to kill, or at least a criminal disregard for people’s lives.”
At least 70 people died on Saturday after security forces attacked supporters of deposed President Mohamed Mursi in Cairo, Muslim Brotherhood spokesman Gehad El-Haddad said, adding the toll could be much higher, according to Reuters.
Egypt's Health Ministry said 65 people had died. The Brotherhood said another 61 were on life support after what it described as a ferocious assault by men in helmets and black police fatigues. The ambulance service put the death toll at 72.
US Defence Secretary Chuck Hagel has expressed deep concern over violence in Egypt and urged restraint in a call with the Egyptian army chief, General Abdel Fattah al-Sisi.
It comes after scores of supporters of deposed President Mohamme Morsi were killed in the last day.
In a statement, Pentagon spokesman George Little said: "The United States believes that the current transition needs to be marked by inclusivity, that Egyptian authorities should avoid politicised arrests and detentions, and take steps to prevent further bloodshed and loss of life."
US Secretary of State John Kerry has said Egyptian authorities must respect the right of peaceful assembly at "a pivotal moment for Egypt".
A statement said: "At this critical juncture, it is essential that the security forces and the interim government respect the right of peaceful protest, including the ongoing sit-in demonstrations."
Mr Kerry also reiterated America's call for an end to politicised detentions and the release of political leaders consistent with law.