Boxer Michael O'Reilly will not fight in Rio after failing a doping test.
The middleweight, 23, was told last Thursday he had failed a test due to an "adverse analytical" finding.
He was suspended, and will not now contest that decision.
In a statement handed to Irish broadcaster RTE, Laois man O'Reilly said he unintentionally took a supplement that may have contained a banned substance.
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