A number of ousted president Mohamed Morsi's supporters broke into the one of Egypt's liberal Constitution Party offices in the San Stefano area of Alexandria, destroying all of its contents, Egypt's state news agency MENA reported.
The attack took place during a pro-Morsi march. MENA reported that protesters also attacked a branch of McDonald's restaurant, damaging its front windows.
MENA also said eyewitnesses said the protesters attacked many shops during their rally.
The Egyptian police dispersed two pro-Morsi sit-ins in Cairo on Wednesday leading to nationwide clashes with supporters of the deposed president. Over 520 were killed and several thousand injured.