“Egyptian police arrested 12 members of the ‘Black Bloc’ — a violent group opposed to the Muslim Brotherhood — after clashes outside Cairo’s presidential palace, the official Mena news agency said on Saturday. Protesters hurled rocks and fire bombs at the walls of the presidential palace in Heliopolis, and torched a police vehicle, a security source told MENA.”
Source: Egypt arrests 12 ‘Black Bloc’ members | GulfNews.com