Rio Alto announces that the annual general and special meeting of its shareholders will be held at the Hyatt Regency Toronto on King, 370 King Street West, Toronto, ON at 11:00 a.m. on Thursday, May 10, 2012. At this meeting, the shareholders will be asked to re-elect the current members of its Board of Directors for the ensuing year, approve an amendment to the Company's by-laws and re-appoint Grant Thornton LLP as
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