Two protestors and an Egyptian policeman have died, during anti-government demonstrations in Cairo.

Thousands of protesters hit the streets on Tuesday, in an unprecedented show of strength against President Hosni Mubarak. NOW, the protests are spreading across the country.

Egypt's security forces used tear gas and water cannon to disperse thousands of protesters in downtown Cairo, injuring dozens of people.

Protestors responded, throwing stones at the police and attacking the water cannon truck.

Many people were injured in the clashes, while some lay unconscious from the tear gas.

Gameela Ismail, Political Activist, said, "To what end? That is the question, will our demands be met? We have a lot of demands starting from Mubarak quitting, all the way down to other social, economic and political demands. Which ones will come true and which will continue to be a problem are all questions we don't know the answer to right now."

Egypt's largest demonstration in years began peacefully on Tuesday morning. But things took a turn for the worse only a few hours later.

Security sources estimate over 10 thousand people have taken part in the rally in Cairo.

One policeman is reported to have died, after being hit on the head by a rock. Meanwhile, there are reports that two protestors were killed during similar protests in the city of Suez.

On Tuesday, a Facebook page quoted 93 thousand people as saying they would take part in the rallies.

The United States, a close ally of Egypt, is calling for restraint from all sides. US Secretary of State Hillary Clinton expressed confidence in Egypt's government, saying the US is looking at ways to respond to the legitimate needs and interests of the Egyptian people.