CAIRO - Egyptian President Mohamed Morsi declared a month-long state of emergency in three cities along the Suez Canal where dozens of people have been killed over the past four days in protests his allies say are designed to overthrow him.

Seven people were shot dead and hundreds were injured in Port Said on Sunday during the funerals of 33 people killed there when locals angered by a court decision went on the rampage as anti-government protests spread around the country.

Mourners attend the funerals of 33 people who died on Saturday, during clashes provoked by a court verdict on a deadly stadium disaster last year, in Port Said, Jan 27, 2013. [Photo/Agencies]

A total of 49 people have been killed since Thursday and Morsi's opponents, who accuse his Islamist Muslim Brotherhood of betraying the revolution that ousted long-time ruler Hosni Mubarak, have called for more demonstrations on Monday.

"Down, down Morsi, down down the regime that killed and tortured us!" people in Port Said chanted as the coffins of those killed on Saturday were carried through the streets.

Morsi, who was elected in June, is trying to fix a beleaguered economy and cool tempers before a parliamentary poll in the next few months which is supposed to cement Egypt's transition to democracy. Repeated eruptions of violence have weighed heavily on the Egyptian pound.

In a televised address, he said a nightly curfew would be introduced in Port Said, Ismailia and Suez, starting Monday.

Several hundred people protested in Ismailia, Suez and Port Said after the announcement, in which Morsi also called for a dialogue with top politicians. Activists in the three cities vowed to defy the curfew in protest at the decision.

"The protection of the nation is the responsibility of everyone. We will confront any threat to its security with force and firmness within the remit of the law," he said, offering condolences to families of the victims.

In Cairo the newly appointed Interior Minister Mohamed Ibrahim was ejected from the funeral of one of the police officers who died during Saturday's clashes in Port Said, according to witnesses and police sources.

A police officer at the funeral said many of his colleagues blame the interior minister for the deaths of at least two policemen during Saturday's clashes as he did not allow the police there to carry weapons and were only given teargas bombs.

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