Protests and violence have continued overnight in Egypt as thousands defied curfews imposed by President Mohammed Morsi. Marches took place in the cities of Port Said, Ismailia and Suez after dark, despite the curfews and a temporary state of emergency. Dozens of people have been killed in five days of violent protests. Meanwhile Mr Morsi's call for national dialogue has been rejected by his political opponents. He had urged opposition leaders to attend a meeting on Sunday evening in an effort to calm the situation, but only Islamists already aligned with the president turned up. The latest protests in the cities along the Suez canal were sparked by death sentences handed down by a Port Said court on 21 local football fans involved in deadly riots at a football match in the city almost a year ago. Elsewhere Egyptians more broadly opposed to Mr Morsi's authority have taken to the streets in the wake of the Egyptian revolution's second anniversary. More deaths on Monday mean that between 50 and 60 people are now believed to have been killed in violent clashes with security forces since Thursday. Earlier, state news agency Mena reported six deaths in Port Said during daylight hours on Monday, when funerals were held for three people killed on Sunday. After nightfall, groups attacked police stations and one man was killed, according to medical sources. Security men and soldiers were also injured, Egyptian authorities said, but troops in tanks and armoured vehicles in Suez and Port Said did not appear to be intervening to uphold the curfew. One protester in Ismailia, Khalid Ali, said: "We are completely rejecting everything that President Morsi declared yesterday. "He imposed a curfew and a state of emergency (which) he used to oppose when he was a member of the parliament. We are here in Ismailia in solidarity with our brothers in Suez and Port Said."