Chelsea have been forced to close their academy training centre after a coronavirus outbreak.
The facility will undergo a deep clean after a number of positive COVID-19 tests were returned over the weekend, according to the Telegraph.
However, the club's first-team facility will remain open.
Those youth players who have tested positive will now self-isolate for ten days.
Frank Lampard's squad have been kept in a separate bubble to the academy and women's squads.
The decision means Chelsea's development squad clash with West Ham on Friday has been postponed.