Despite international pressure, violence erupted in Egypt as forces moved in to clear out supporters of ousted President Mohamed Morsi.
Security forces reportedly fired tear gas into the camps, and pro-Morsi supporters say government forces used live bullets. The government denies the claim.
At least two security force members have died, and as many as 25 protesters are also reported dead.
Pro-Morsi supporters have been camped out since Morsi's removal from office July third. They have been preparing for this clash for weeks now. Protestors tried to strengthen their campsites with homemade concrete and other reinforcements. Makeshift hospitals were even set up in case there was bloodshed.
Last week U.S. Senators John McCain and Lindsey Graham visited Egypt and urged military leaders there to refrain from violence. The U.S. gives billions of dollars in aid to Egypt.
Earlier this week, McCain said those funds would be on the line in violent force was used by the Egyptian military.