FBI Director James Comey will testify Thursday in public before the House Oversight and Government Reform Committee.
The Justice Department said the former senior FBI official who provided the secret informants in New York, Florida and Maryland will testify before the panel in an open session.
The testimony is set to take place in a closed session of the committee, which is holding public hearings on the Justice Department’s handling of the Trump administration’s investigations into Russia’s meddling in the 2016 election.
Comey said earlier this week that he would not be making the appearance publicly until after the panel adjourns on Dec. 19.
Comey, who took over as director in January, has been under intense scrutiny since revelations about the Trump campaign’s dealings with Russia emerged in March.
The FBI director testified publicly about the probe at a congressional hearing last week, and he has denied any collusion with Russia.
The House Intelligence Committee is also expected to hold a public hearing Thursday on the Trump-Russia probe.
The panel is chaired by Republican Rep. Trey Gowdy, the South Carolina lawmaker who chairs the panel’s oversight committee.
The Associated Press contributed to this report.