On the same day President Trump acknowledged contracting the coronavirus, the White House quietly informed a veterans group that there was a COVID-19 risk stemming from a Sept. 27 event honoring the families of fallen U.S. service members, the head of that charitable organization told The Daily Beast.

The White House warning, which came on Oct. 2, is the earliest known outreach to visitors of the complex that there was a risk of coronavirus emerging from the grounds where the president, the first lady, and at least 17 of his aides, according to Politico, have now tested positive for the virus.

The Sept. 27 event to honor Gold Star families came the day after the White House hosted a celebration for Supreme Court nominee Amy Coney Barrett that appears to have been an early source of the White House outbreak, though West Wing officials have quietly disputed that linkage. It is unclear to the head of the veterans charity—the Greatest Generations Foundation—which participant’s potential positive coronavirus test sparked the warning.