(Subscription-barrier) Roll Call reports:

The FBI is close to finishing a series of interviews with the top Congressional leaders and other key Members in both chambers as part of its wide-ranging criminal probe of alleged leaks of the previously classified domestic surveillance program.

Raw Story adds

(FBI) agents and Justice Department officials are investigating whether any of the 15 current and former Members briefed earlier this decade about the National Security Agency spying program were a source for a New York Times report about the issue last December.

There are also indications from at least one Senator, Ted Stevens (R-Alaska), that the FBI is asking Members about comments of theirs that appeared in other publications regarding the NSA program.

The interviews, which came about after extensive negotiations this spring between the Justice Department and the counsels for the House and Senate, are taking place in Members’ Congressional offices, usually with two FBI agents and one Justice Department lawyer in attendance. Members are also permitted to have a House or Senate counsel on hand if they wished.