Michael O'Neill has tested positive for coronavirus and has been ordered to self-isolate.
The current Stoke City manager, who played three seasons for Hibs in the 1990s, was confirmed to have the virus after a round of testing on Monday.
He had been preparing his side for the start of the English Championship season later this month, but now has to stay away from training for at least a week.
O'Neill, who left his job as Northern Ireland manager earlier this year, played three seasons at Easter Road between 1993 and 1996.
He turned down an offer to become Scotland manager two years ago.
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A statement from his club said: "Stoke City can confirm that manager Michael O’Neill has tested positive for the COVID-19 virus following the latest round of testing on Monday (June 8).
"O'Neill had tested negative in the previous five rounds of testing.
"He will now follow the relevant guidance and undergo a period of isolation, whilst continuing to be in regular virtual contact with his coaching staff and players.
"Assistant manager Billy McKinlay will take charge of training as the Potters prepare for their game against Reading on June 20.
"The club will be making no further comment on this matter."
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