Supporters of Egyptian President Hosni Mubarak take part in a pro-regime demonstration in Cairo on February 2, 2011. Partisans of Mubarak stormed a crowded anti-regime rally in central Cairo, sparking pandemonium in which at least 500 people were hurt and one killed, witnesses said.

An Egyptian anti-government demonstrator gestures as he stands on an Egyptian army tank at Cairo's Tahrir Square where crowds have gathered for a protest calling for the ouster of President Hosni Mubarak on February 2, 2011.

Egyptian anti-government demonstrators (bottom) face pro-regime opponents during clashes in Cairos central Tahrir square where crowds have gathered for days calling for the ouster of President Hosni Mubarak on February 03, 2011.

Egyptian anti-government demonstrators use a mobile phone's light while treating a wounded protester at Cairo's Tahrir square where crowds have gathered for a protest calling for the ouster of President Hosni Mubarak on February 2, 2011.

A wounded Egyptian anti-government demonstrator rests by a wall after receiving treatment at Cairo's Tahrir Square where crowds have gathered for a protest calling for the ouster of President Hosni Mubarak on February 2, 2011.

Supporters of embattled Egyptian President Hosni Mubarak (top) clash with opposition protestors in Cairo's Tahrir square on February 02, 2011.

Egyptian anti-government demonstrators stand on an Egyptian army tank at during a protest calling for the ouster of President Hosni Mubarak at Cairo's Tahrir square on February 2, 2011.

An injured pro-Mubarak supporter is detained by anti-government demonstators at an underground metro station after being rounded up during clashes at Tahrir Square in Cairo February 3, 2011. Anti-government protesters said on Thursday they were more determined than ever to topple President Hosni Mubarak after supporters loyal to him charged Tahrir Square, sparking violence that killed five people.

Wounded Egyptian anti-government demonstrators shout slogans in Cairos central Tahrir square where crowds have gathered for days calling for the ouster of President Hosni Mubarak on February 03, 2011.

An anti-government demonstrator, wounded during clashes with pro-government protesters, sleeps at Tahrir square in Cairo February 3, 2011. Anti-government protesters said on Thursday they were more determined than ever to topple President Hosni Mubarak after supporters loyal to him charged Tahrir Square, sparking violence that killed five

CAIRO, EGYPT - FEBRUARY 03: People line up to get past a makeshift barricade guarded by anti-government protesters at the entrance to Tahrir Square on February 3, 2011 in Cairo, Egypt. Clashes between groups opposed to President Hosni Mubarak and supporters of his 30 year rule continued into the night, as the Egyptian health minister reported that five people died in yesterday's violence.