Egyptian demonstrators gathering in central Cairo Tuesday evening are circulating a pamphlet that raises four demands to the government including the ouster of President Hosni Mubarak.

According to Xinhua reporters there, the four demands including the stepping down of Mubarak, the resignation of the cabinet led by Prime Minister Ahmed Mahmoud Mohamed Nazef, dissolving the People's Assembly and rescheduling elections, and establishing a new government supported by the people.

Some Egyptian opposition parties, including the Wafd Party, the Ghad Party and the Democratic Front Party, also came up with conditions after an emergency meeting Tuesday evening to the regime for not supporting the massive demonstration.

Their demands include both Mubarak and his son Gamal should not run for the president election scheduled later this year, dissolving the People's Assembly, annulling the Emergency Law and releasing political prisoners.

Protesters continued to demonstrate after the nightfall in the Tahrir Square and vowed to carry on until dawn.

Tens of thousands of Egyptian protesters launched an unprecedented demonstration on Tuesday against corruption, poverty, unemployment and other social grievance, calling for an end of Mubarak's 30-year ruling.

The demonstration, the largest one since Mubarak took office in 1981, started peacefully on Tuesday afternoon, but turned to violence several hours later.

Riot police clashed with demonstrators, firing tear gas and using water cannons to disperse crowds in central Cairo, while protestors threw stones at the police and attacked the water cannon truck in return.

A police officer died after being beaten by protesters in the violence in Cairo. while two protesters died in the eastern port city of Suez in clashes with police.