Mixed martial arts star Conor McGregor has been issued an 18-month suspension after missing three drug tests in a 12-month period, anti-doping authorities said Tuesday.

Irishman McGregor, 37, a former Ultimate Fighting Championship featherweight and lightweight champion, has accepted the suspension, Combat Sports Anti-Doping (CSAD) said in a statement.

CSAD said McGregor, one of UFC’s most bankable fighters, missed three tests on June 13, September 19 and September 20 last year in a breach of anti-doping “whereabouts” protocols.

The agency said McGregor had fully cooperated with its investigation, accepted responsibility and provided information that helped explain why he had missed tests.

“Despite these mitigating factors, CSAD emphasizes that accurate whereabouts filings and the abil

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