The BBC wrote:Police in Cairo are using tear gas and water cannon to try to quell rare anti-government protests.
Thousands have joined the protests after an internet campaign inspired by the uprising in Tunisia.
They are marching through Cairo and other areas chanting anti-government slogans, after activists called for a "day of revolt" in a web message.
Weeks of unrest in Tunisia eventually toppled President Zine al-Abidine Ben Ali earlier this month.
Such protests are uncommon in Egypt, which President Hosni Mubarak has ruled since 1981, tolerating little dissent.
Jack Shenker, protester wrote:Down-town Cairo is a war zone tonight – as reports come in of massive occupations by protesters in towns across Egypt, the centre of the capital is awash with running street battles. Along with hundreds of others I've just been tear-gassed outside the parliament building, where some youths were smashing up the pavement to obtain rocks to throw at police.
We've withdrawn back to the main square now were thousands more demonstrators are waiting and a huge billboard advertising the ruling NDP party has just been torn down. Security forces are continuing to use sound bombs and tear-gas to disperse the crowd, but so far to no avail.
Hopefully these uprisings could be the start in the process of bringing better lives to millions across the countries of North Africa.