Congressional Republicans on Sunday pressed their investigation into the Benghazi attacks, suggesting depositions for high-ranking officials and more whistle-blowers testifying amid further questions about why then-Secretary of State Hillary Clinton was not thoroughly interviewed about the issue.

Rep. Mike Rogers, chairman of the House Permanent Select Committee on Intelligence, told “Fox News Sunday” that more potential and self-proclaimed “whistle-blowers” might come forward after three of them – career State Department foreign service employees – testified last week before the House Oversight and Government Affairs Committee.

“We have had people come forward because of the (hearing) and say we would also like to talk,” the Michigan Republican told “Fox News Sunday.” “I do think we’re going to see more whistle-blowers. Certainly my committee has been contacted; I think other committees as well.”