Dozens of members of staff working at Afghanistan's presidential palace have tested positive for coronavirus.
Twenty cases were initially reported, but on Sunday the New York Times said the number had risen to 40.
The Afghan government has not commented and there is no suggestion that President Ashraf Ghani himself has been infected, reports BBC.
Mr Ghani, 70, reportedly lost part of his stomach to cancer in the 1990s.
"Twenty-odd people are infected with COVID-19 in the presidential palace. However, it is [being] kept under wraps to ensure no panic is caused," one government official told AFP on Saturday.
Afghan government figures from Saturday showed 933 confirmed cases of coronavirus in Afghanistan as a whole, with 33 deaths.
While the numbers appear low, the country has limited access to testing and the health system has suffered under decades of conflict.