Protesters clashed with police in the Egyptian capital on on Monday leaving dozens injured on the first anniversary of street battles that left 45 demonstrators dead, witnesses said.
The clashes erupted when protesters tried to destroy a concrete barrier security forces had put up to end last year's fighting with activists who wanted the then military rulers to transfer power to a civilian government.
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A medic said at least 10 policemen and 60 protesters were wounded in the clashes.
At least 45 protesters died in the five days of street battles that began on November 19 last year to put pressure on the military, which took power after a popular uprising overthrew president Hosni Mubarak in February.
The military responded by promising to hand over power by June this year. It transferred control to Islamist President Mohamed Morsi after his election that month.