Mary B. McCord, the acting assistant attorney general for national security and one of the officials overseeing the Justice Department’s investigation into Russian interference in the 2016 election, announced this week that she will step down in May.

McCord made the announcement to department employees and said she plans to leave in mid-May, a spokesman told Politico on Thursday.

The Intercept first reported McCord’s planned departure on Wednesday.

The division McCord oversees is leading the Department of Justice’s probe into Russian interference in the 2016 election, as well as any ties between members of President Donald Trump’s campaign and Russia.

An unnamed former Justice Department official told Politico that he did not think McCord’s departure would cause “tremendous disruption” to the investigation, but said a replacement would need to “step in at a senior level.”