The head of Egypt’s army has given a televised address, announcing that President Mohamed Morsi has been removed from power. General Abdul Fattah al-Sisi said the constitution had been suspended and the head of the country’s highest court, Adli Mansour, has been appointed the interim head of state.

"This roadmap includes suspending the constitution, holding early presidential and parliamentary elections, as well as the formation of a national reconciliation committee that would include youth movements," said General Abdul Fattah al-Sisi.

"The head of the Supreme Constitutional Court has the authority to announce constitutional statements during the transitional period. The roadmap also includes setting up a panel to review the constitutional amendments."

After the announcement, millions of anti-Morsi protesters in cities across the country erupted in scenes of joy. Muslim and Christian leaders made brief statements in support of the announcement.

But Morsi has rejected it, calling the army’s move a "military coup". He says he remains the country’s only legitimate leader and is open to negotiations.

The army’s move to depose Morsi comes following four days of mass demonstrations against the government, and an ultimatum issued by the military which expired on Wednesday afternoon.

Since Morsi was ousted, clashes have erupted in the northern city of Marsa Matrouh and four people have been killed. TV stations belonging to Morsi’s Muslim Brotherhood have gone off air and the state news agency, Mena, says some managers at the Brotherhood's Misr 25 channel have been arrested.

In Cairo, the army has stationed troops at major intersections and surrounded rallies being held by Morsi’s supporters. Travel bans have also been imposed on Morsi and top figures from his Muslim Brotherhood party.