Hundreds of security forces imposed a blockade on dozens of pro-reform activists while side skirmishes took place between police and demonstrators, who gathered Tuesday to mark two years of their campaign to end President Hosni Mubarak's rule. With fists and batons, anti-riot police were seen hitting supporters of the pro-democracy Kifaya movement who pushed a metal barricade in an attempt to widen their demonstration beyond the cordon outside the press syndicate where the protest took place. Protesters from the group, which held its first demonstration in Dec. 2004, chanted anti-Mubarak slogans and carried banners denouncing the increased prices of food staples. "Civil disobedience is the only way to bring change," read a big yellow placard. "Enough tyranny, enough oppression and enough killing," some of the protesters shouted. Another demonstrator waving a zucchini chanted "Enough of the increased price of zucchini." Kifaya is Arabic for enough.