Google Inc computer scientist Vint Cerf and civil liberties leaders also participated in the meeting, along with Apple’s Tim Cook and AT&T’s Randall Stephenson, Politico said late Thursday, citing sources familiar with the matter.

The session was not included on Obama’s daily public schedule for Thursday.

The closed-door meeting followed another private session on Tuesday between top Obama administration officials, industry lobbyists and privacy advocates, Politico reported, adding that the latest meeting “was organized with greater secrecy.”

One administration aide characterized Tuesday’s meeting was as part of a larger outreach effort, Politico said.