(CAIRO) -- Tear gas and the sound of gunfire filled the air around Cairo's Tahrir Square for a third day running on Sunday.
Police in full riot gear, long associated with the hated regime of ousted President Hosni Mubarak, have were sent in to clear Tahrir Square. Officers were accompanied by armored personnel carriers.
Protesters threw stones and other missiles at riot police to throw them back.
The square was effectively cleared, only to be packed with protesters again in a matter of minutes.
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