Samantha Power, the former U.S. ambassador to the United Nations, visited Capitol Hill on Friday for a closed-door interview with House investigators looking into the ‘unmasking’ of Trump associates under the Obama administration.

The questioning involved House Intelligence Committee investigators.

Power is among the Obama administration figures who made requests to identify Americans whose names surfaced in foreign intelligence reporting, known as unmasking.

As reported by Fox News last month, sources have said Power was unmasking at such a rapid pace in the final months of the Obama administration that she averaged more than one request for every working day in 2016.

SAMANTHA POWER SOUGHT TO UNMASK AMERICANS ON ALMOST DAILY BASIS, SOURCES SAY

Two sources, who were not authorized to speak on the record, said the requests exceeded 260 last year.

Last month, a Power spokesman provided this statement to Fox News challenging the claims:

"The anonymously sourced reports about Ambassador Power’s intelligence requests are false. Ambassador Power looks forward to engaging the bipartisan Committee in the appropriate classified forum."

Three of the nation's intelligence agencies received subpoenas in May explicitly naming three top Obama administration officials: Former national security adviser Susan Rice, former CIA director John Brennan and Power.

Fox News’ Catherine Herridge, Chad Pergram and Bret Baier contributed to this report.