HARARE, Feb 21 (Reuters) - Zimbabwe police on Wednesday imposed a 3-month ban on political rallies and protests in the capital's volatile townships to calm tensions, a move the opposition likened to "a state of emergency." The ban, announced in state newspapers, followed weekend clashes between the police and opposition Movement for Democratic Change (MDC) supporters in Highfield township -- a traditional hotspot of opposition politics -- which saw riot squads fire teargas and water cannon to stop an MDC rally.
