Egypt protests mark revolution anniversary (VIDEO)

CAIRO, Egypt — Egyptian President Mohammed Morsi has appealed for an end to protests marking the the second anniversary of Egypt's revolution that have left at least 456 people injured across the country since Thursday.  

Police have clashed with protesters and, according to CNN, at least 29 protesters in Cairo's Tahrir Square have been treated for cuts, broken bones and birdshot injuries. 

The Interior Ministry has also said six police officers were hurt near the square.

Beyond Cairo, violent protests were reported in Alexandria and Suez, and protesters set fire to the Muslim Brotherhood's headquarters in Ismailia, according to the BBC.

Seven people, one of them a policeman, died in protests in Suez, Reuters reported.

Morsi offered his condolences to the friends and families of the victims via his Twitter account, Ahram Online reported. "Egypt's [security] apparatuses will chase the criminals and bring them to justice," he said in one Tweet.

"We're not celebrating because the goals of the revolution have not been achieved – bread, social justice and dignity," Naglaa Marzouk, a teacher, told USA Today from Tahrir Square.

"This is the youth, who I am looking toward," she said, pointing to a young man who complained of no work and high unemployment. "This is the future of Egypt."

GlobalPost Senior Correspondent Erin Cunningham is also reporting from Cairo, tweeting pictures of the crowd that has gathered in Tahrir Square.

Cunningham noted that tear gas is being used liberally, as it was when the revolution started two years ago, and that people are wearing surgical masks to ward off the effects. Not everyone was able to protect themselves from the gas:

According to Sky News, the opposition is said to be protesting Egyptian President Mohamed Morsi and his party, the Muslim Brotherhood, with the same slogan used in 2011: "Bread, freedom, social justice."

Sky News reported that opposition leader and former head of the UN's atomic agency, Mohamed ElBaradei, wrote on his Twitter account: "Go out into the squares to finally achieve the objectives of the revolution."

But not all protesters' missions were clear, according to GlobalPost's Cunningham:

Roads leading from Tahrir Sqaure to nearby government buildings and foreign embassies have been blocked by concrete walls since last November, but protesters attempted to dismantle them Thursday night. A new wall has since been built to block entry to the Cabinet headquarters.

Cunningham shot video of the protesters:

They are chanting: "The revolution came back for change. In the name of your bloody, martyr, it’s a new revolution. They said legitimacy and they said sharia. And they killed our brothers at [the presidential palace] Ittihadiya. Down, down with the [Muslim Brotherhood] supreme guide’s dream. Secular, secular!"