Washington ? The Obama administration on Friday implored the website WikiLeaks to stop posting secret Afghanistan war documents, as the Pentagon pressed its investigation of the massive security breach by bringing a soldier under scrutiny back to the U.S. for trial.

Administration officials said the investigation into the release of the documents — more than 76,900 so far — could extend beyond members of the military.

White House spokesman Robert Gibbs said WikiLeaks’ online posting of mostly raw military intelligence reports jeopardized national security and put the lives of Afghan informants and U.S. troops at risk.