Egyptian President Mohamed Morsi has declared a 30-day state of emergency and a night-time curfew in three cities along the Suez Canal that have seen deadly clashes in recent days.

In a televised address late on Sunday, Morsi said the emergency measures in Port Said, Ismailia and Suez would take effect on Monday from 9:00pm local time (19:00 GMT) to 6:00am (04:00 GMT), warning that more action would be taken to stem the latest eruption of violence across much of the country.

"I have said I am against any emergency measures but I have said that if I must stop bloodshed and protect the people then I will act," Morsi said.

He also called for dialogue with top politicians starting on Monday to resolve the situation.

Deadly clashes across the country between protesters and police have killed at least 48 people since Friday, when Egyptians commemorated the two-year anniversary of the revolution that toppled former President Hosni Mubarak.

Seven people were shot dead and hundreds were injured in Port Said on Sunday during the funerals of at least 30 people killed during clashes in the city on the previous day.

On Sunday night, Morsi’s office issued a statement inviting political supporters and opponents for a national dialogue on Monday at 6:00pm (16:00 GMT) at the presidential palace in Cairo.

The spokesman for Egypt's main opposition coalition said after Morsi's speech that the move was "expected" and said he wanted more details about an invitation for dialogue with top politicians.

Protesters are seen through tear gas fired by riot police during clashes along Qasr Al Nil bridge, which leads to Tahrir Square in Cairo January 27, 2013.

Aljazeera