FBI Director James Comey acknowledged in a Friday letter to agency employees that his earlier letter to lawmakers regarding emails “pertinent to the investigation” of Hillary Clinton’s private server had a “significant risk of being misunderstood.”

“It would be misleading to the American people were we not to supplement the record,” Comey wrote in the letter published by the Washington Post.

He acknowledged the possibility of creating a “misleading impression,” particularly given the proximity to Election Day, but wrote that he felt an “obligation” to inform Congress.

“In trying to strike that balance, in a brief letter and in the middle of an election season, there is significant risk of being misunderstood,” Comey wrote.

In a letter sent to lawmakers early Friday afternoon, Comey wrote that his agency was looking into emails “pertinent” to the FBI’s previous investigation into Clinton’s use of a private server as secretary of state.

Republicans were quick to jump on the news and criticize Clinton, while the Democratic nominee’s campaign called on the FBI to provide “full details” about the emails in question.

Read the full letter from Comey below: