Supporters of President Hosni Mubarak run towards anti-Mubarak protesters in central Cairo, Egypt, Wednesday, Feb.2, 2011. Several thousand supporters of President Hosni Mubarak, including some riding horses and camels and wielding whips, clashed with anti-government protesters Wednesday as Egypt's upheaval took a dangerous new turn. (AP Photo/Ahmed Ali)

Pro-government supporters of Egyptian President Hosni Mubarak clash with anti-government protesters in Tahrir square in central Cairo February 2, 2011. Egypt's army denied firing any shots in Cairo's Tahrir Square, where pro- and anti-government protesters were clashing, state television said on Wednesday. REUTERS/Yannis Behrakis

An injured demonstrator has blood wiped off his face during clashes between pro and anti-Mubarak supporters clash at Tahrir Square in Cairo February 2 , 2011. Opponents and supporters of Egypt's President Hosni Mubarak fought with fists, stones and clubs in Cairo on Wednesday in what appeared to be a move by forces loyal to the Egyptian leader to end protests calling for him to quit. REUTERS/Goran Tomasevic

Pro and anti-Mubarak supporters clash in Tahrir Square, in Cairo, Egypt, Wednesday, Feb.2, 2011. Several thousand supporters of President Hosni Mubarak, including some riding horses and camels and wielding whips, clashed with anti-government protesters as Egypt's upheaval took a dangerous new turn. In chaotic scenes, the two sides pelted each other with stones, and protesters dragged riders off their horses. (AP Photo/Ahmed Ali)

Demonstrators are seen during rioting between pro- and anti-Mubarak supporters in Tahrir Square in Cairo February 2 , 2011. REUTERS/Goran Tomasevic

Anti-government protesters destroy the area around a monument in order to use the rubble for rocks during clashes in Tahrir, or Liberation square, in Cairo, Egypt, Wednesday, Feb. 2, 2011. Several thousand supporters of President Hosni Mubarak, including some riding horses and camels and wielding whips, clashed with anti-government protesters Wednesday as Egypt's upheaval took a dangerous new turn. (AP Photo/Tara Todras-Whitehill)

Pro-government demonstrators on horses, camels, and horse-drawn carriages used in the clashes, retreat back past a police truck that was burned in previous clashes a week ago, near Tahrir square in Cairo, Egypt, Wednesday, Feb. 2, 2011. (AP Photo/Ben Curtis)

A pro-government demonstrator and anti-government protestor argue in Tahrir square, the center of anti-government demonstrations, Cairo, Egypt, Wednesday, Feb. 2, 2011. Several thousand supporters of President Hosni Mubarak, including some riding horses and camels and wielding whips, clashed with anti-government protesters as Egypt's upheaval took a dangerous new turn. (AP Photo/Laurent Cipriani)

Anti-government demonstrators, wounded during clashes with pro-government protesters, wait to be seen at a makeshift medical triage station, near Tahrir square, the center of anti-government demonstrations, in Cairo, Egypt, on Wednesday, Feb. 2, 2011. Thousands of supporters and opponents of Egyptian President Hosni Mubarak battled in Cairo's main square Wednesday, raining stones, bottles and firebombs on each other in scenes of uncontrolled violence as soldiers stood by without intervening. (AP Photo/Lefteris Pitarakis)

Pro-Mubarak demonstrators try to protect themselves from stone-throwing anti-Mubarak supporters during riots in Tahrir Square in Cairo February 2 , 2011. Opponents and supporters of Egypt's President Hosni Mubarak fought with fists, stones and clubs in Cairo on Wednesday in what appeared to be a move by forces loyal to the Egyptian leader to end protests calling for him to quit. REUTERS/Goran Tomasevic

Pro-government demonstrators, bottom, are seen during clashes with anti-government demonstrators, top, in Tahrir square, the center of anti-government demonstrations, in Cairo, Egypt, early Thursday, Feb. 3, 2011. Thousands of supporters and opponents of Egyptian President Hosni Mubarak battled in Cairo's main square all day Wednesday, raining stones, bottles and firebombs on each other in scenes of uncontrolled violence as soldiers stood by without intervening. (AP Photo/Lefteris Pitarakis)

Pro-government protesters (L) clash with anti-government protesters outside the National Museum near Tahrir square in Cairo early February 3, 2011. Opponents and supporters of Egypt's President Hosni Mubarak fought with fists, stones and clubs in Cairo on Wednesday in what appeared to be a move by forces loyal to the Egyptian leader to end protests calling for him to quit. REUTERS/Yannis Behrakis

Pro-Mubarak supporters are 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. REUTERS/Amr Abdallah Dalsh

Pro-government demonstrators, below, some riding camels and horses and armed with sticks, clash with anti-government demonstrators, above, who pull one off his white horse and beat him, in Tahrir square, the center of anti-government demonstrations, in Cairo, Egypt Wednesday, Feb. 2, 2011. (AP Photo/Ben Curtis)

Pro-government demonstrators, below, some riding camels and horses and armed with sticks, clash with anti-government demonstrators, above, in Tahrir square, the center of anti-government demonstrations, in Cairo, Egypt Wednesday, Feb. 2, 2011. (AP Photo/Ben Curtis)