Shastri returned a positive lateral flow test and he is now in isolation along with three members of his backroom staff, bowling coach Bharat Arun, fielding coach R Sridhar and physio Nitin Patel, who have all been deemed close contacts.
All other members of India’s touring party returned two negative lateral flow tests.
A statement from the BCCI read: “The BCCI Medical Team has isolated Mr Ravi Shastri, Head Coach, Mr B. Arun, Bowling Coach, Mr R. Sridhar, Fielding Coach and Mr Nitin Patel, Physiotherapist as a precautionary measure after Mr Shastri’s lateral flow test returned positive last evening.
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“They have undergone RT-PCR testing and shall remain in the team hotel and not travel with Team India until confirmation from the medical team.
“The remaining members of the Team India contingent underwent two Lateral Flow Tests – one last night and another this morning.
“The members upon returning negative COVID reports were allowed to proceed for Day 4 of the ongoing fourth Test at The Oval.”
Speaking on the Sky Sports broadcast, former England captain Nasser Hussain said: “The players are absolutely fine, but four of the backroom staff, including their influential coach, Ravi Shastri, are not here. We wish you well, all of you.”
It is not the first Covid scare that India have suffered on this tour, with wicketkeeper Rishabh Pant testing positive before the start of the series.
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Then, training assistant and net bowler Dayanand Garani also tested positive for Covid, forcing him into quarantine for 10 days along with three close contacts, wicketkeeper Wriddhiman Saha, opener Abhimanyu Easwaran and Bharat Arun.
As India were touring England, a separate Indian side was in Sri Lanka for an ODI and T20I series, where Krunal Pandya, Yuzvendra Chahal and Krishnappa Gowtham all tested positive for Covid.