Here's a summary of the day's events so far on a momentous day in Egypt's history:
Live blog: recap
President Hosni Mubarak has ordered a curfew in three cities (3.30pm), later extended to the entire country, which was supposed to start at 6pm today and last until 7am tomorrow morning but it has been roundly ignored as clashes have continued.
Mubarak has sent in the army to restore order in Cairo, Alexandria and Suez but protesters cheered the army in some areas, calling on them to side with them against the police (3.43 pm). In some areas the army has done so. Soldiers have shaken hands with protesters in Alexandria and in Cairo. Demonstrators have clambered onto tanks in Suez and Cairo. There have also been unconfirmed reports of clashes between the army and police
There have been unconfirmed reports of many protesters killed today, including a woman in Tahrir square in Cairo, two people in Suez, one named as Hamada Labib, 30, a driver., one person in Alexandria and a 14-year-old in Port Said.
In the country's strongest intervention so far, US secretary of state Hillary Clinton said the US is "deeply concerned about the use of violence by Egyptian police and security forces against protestors". (5.12pm)
Some police are reported to have joined the protesters, who welcomed them to their ranks. (5.05pm)
Police immediately attacked protesters after Friday prayers (11.12am) but protesters remained defiant and fought back, overwhelming police and government buildings right across the country. The ruling NDP's party headquarters in Cairo were set on fire (4.23pm).