Egyptian protesters clashed with police near the Presidential Palace in Cairo on Friday leaving at least 16 people injured, Al Arabiya correspondent reported.
To disperse protesters, who were throwing rocks at the police to keep them away from the vicinity, security forces in turn fired tear gas.
A police car was also set ablaze by the angry demonstrators.
The clashes came after dozens of protesters from Tahrir Square, backed up by the Black Bloc group and football ultras youth, started their march toward the Presidential Palace from Al-Murj metro station in the capital.
Black Bloc group stands against Islamist President Mohammed Mursi and the Muslim Brotherhood, and its slogan is “chaos against injustice.” The group emerged in January and was at the forefront of anti-government protests in Cairo, Alexandria and the Suez Canal.
On Saturday, Egypt’s state security prosecution detained seven Black Bloc members and banned them from traveling on charges the group seeks to cause destruction in the country.
In another incident on Friday, the black-clad group threw Molotov cocktail at the headquarters of the Freedom and Justice Party in Al-Sharqiya provice, Youm 7 newspaper reported Friday.
The party is the political arm of the Muslim Brotherhood movement.
Before setting the exterior frontier of the party’s headquarters on fire, the group was protesting against the Brotherhood.