Supporters of deposed Egyptian President Mohamed Morsi as they shout slogans during a protest outside Raba El-Adwyia mosque in Cairo July 8, 2013. CAIRO, July 15 (UPI) -- Clashes erupted Monday in Cairo between Egyptian security forces and supporters of ousted President Mohamed Morsi, observers said. Violence was reported Monday evening after police fired tear gas into a crowd of pro-Morsi protesters who had blocked traffic on the Six of October Bridge across Ramses Street, witnesses told Ahram Online. The bridge was later reopened to traffic. In Cairo's Naser City district, military police prevented about 5,000 protesters from leaving a sit-in near a mosque to head downtown, according to al-Ahram's Arabic website. Earlier, Egypt's military-led regime said it had frozen the assets of 14 Muslim Brotherhood leaders with ties to Morsi. Among the leaders whose assets were frozen was millionaire businessman and Islamic activist Khairat el-Shater, the initial presidential candidate of the Brotherhood's Freedom and Justice Party during last year's election that Morsi won.