CAIRO — A massive crowd of tens of thousands calling for the ouster of Egyptian President Hosni Mubarak was gathering in the streets and squares of downtown Cairo Saturday afternoon, with protesters making clear they reject promises of reform and a new government offered by the embattled leader trying to hang on to power. Egyptians riot 311 (photo credit: AP Photo/Ben Curtis) Egyptian museum on fire 465 (photo credit: AP Photo/Ben Curtis) Egyptian anti-government protesters in Cairo (photo credit: AP) Egyptian anti-government protesters in Cairo - Gallery (photo credit: AP) Egyptian anti-government protesters in Cairo - Gallery (photo credit: AP) Egyptian anti-government protests fires in Cairo - Gallery (photo credit: AP) Egypt protester kissing cop - Gallery (photo credit: AP) Egypt protesters on a military APC - Gallery (photo credit: AP) Egypt protesters on a military APC - Gallery (photo credit: AP) Egypt protesters on a military APC - Gallery (photo credit: AP) Egypt protesters clash with riot police - Gallery (photo credit: AP) Egyptian protesters set police van on fire - Gallery (photo credit: AP) Egyptian protester with flag, water cannon - Gallery (photo credit: AP) Egyptian protester has his injuries tended to - Gallery (photo credit: AP) Dozens of tanks and armored personnel carriers fanned out across the city of 18 million, guarding key government building a day after large, violent confrontations emboldened the movement demanding a change of leadership. There was rampant looting across the sprawling city of 18 million and a growing feeling of fear and insecurity.RELATED:Editorial: A region in ferment'Police open fire as protesters re-gather in Cairo'Mubarak sacks gov't; defends police crackdown on protestersIn the city's main Tahrir Square, at the center of Saturday's massive demonstration, there was only a light military presence — a few tanks — and soldiers are not intervening. Few police were seen in the crowds and the protest began peacefully but then police opened fire on some people in the crowd near the Interior Ministry and a number of them were wounded by gunshots. It was not clear whether they used rubber bullets or live ammunition.Click here for full Jpost coverage of unrest in Egypt