HARARE (AFP) - The UN warned on Tuesday that post-election violence in Zimbabwe was rising to near crisis levels ahead of a planned presidential run-off, with opposition supporters bearing the brunt of attacks. As opposition leader Morgan Tsvangirai prepared to return home to contest the election against President Robert Mugabe, his hopes the ballot would be held later this month in a peaceful atmosphere appeared to be wishful thinking. With Tsvangirai's Movement for Democratic Change claiming 32 of its supporters have been killed since voting on March 29, the United Nations resident representative in Zimbabwe said most of the violence...