IPL 2020 CSK team News: 1 Indian Chennai Super Kings player and 12 staff members test positive for covid-19

IPL 2020: In a big blow to Chennai Super Kings Indian Premier League aspirations, 13 staff members were tested positive for covid-19. One Indian fast bowler and 12 members from support staff and social media team were reported positive. InsideSport tried reaching out to CSK CEO Vishwanathan but he was unavailable to answer
InsideSport had earlier reported that CSK had decided to extend their quarantine period until September 1.
CSK which completed its six day mandatory quarantine period today was expected to start training at the ICC Academy today. But instead team chose to extend the quarantine period till Tuesday next week.
The reason for the same is yet not known.
The extension of the quarantine period has put question mark over the well-being of CSK squad ?
As per the IPL 2020 protocols, all teams were suppose to go through 3 mandatory Covid-19 tests and only after the results are negative, teams are allowed to train.
The questions which are being asked is, whether someone in the CSK squad tested positive ? If not, why did CSK team extend their quarantine period ?