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The Egyptian army patrolled the streets of Cairo with armored personnel carriers Friday after thousands of angry anti-government demonstrators clashed with tear-gas firing police.

As the government cracked down on protesters across Egypt, opposition leader Mohamed ElBaradei, who returned home to Cairo to join the demonstrations, was placed under house arrest, a high-level security source told CNN.

ElBaradei, a Nobel Peace Prize winner and former head of the United Nations nuclear watchdog agency, was warned earlier not to leave a mosque near downtown Cairo where he was attending Friday prayers.

Authorities imposed a curfew from 6 p.m. to 7 a.m. local time in Cairo, Alexandria and Suez, where the largest demonstrations took place Friday.

via Egypt sends army into streets amid mass protests -

Though a curfew was set, it was ignored.