The FBI is reviewing newly discovered emails that might be pertinent in the investigation of Hillary Clinton’s private email server after additional information came to light in connection with an unrelated case.

Utah Republican Rep. Jason Chaffetz, who serves as chairman of the House Oversight & Government Reform Committee, said Friday that FBI Director James B. Comey informed him of the development.

In a letter to the chairmen of the pertaining House and Senate committees, Comey explained that an unrelated investigation led to the revelation of the pertinent emails.

“Although the FBI cannot assess whether or not this material may be significant, and I cannot predict how long it will take us to complete this additional work, I believe it is important to update your committees about our efforts in light of my previous testimony,” Comey wrote.

Earlier in the week, Chaffetz told The Washington Post that he was planning for “years” of investigations should Clinton be elected president.

FBI Dir just informed me, “The FBI has learned of the existence of emails that appear to be pertinent to the investigation.” Case reopened

— Jason Chaffetz (@jasoninthehouse) October 28, 2016

In July, Comey said he would not recommend legal action against Clinton, the Democratic nominee for president, and the Department of Justice declined to press charges.

At a campaign rally in New Hampshire on Friday, Republican presidential candidate Donald Trump told the crowd, “I need to open with a very critical, breaking news announcement.” He told the cheering rally-goers that the FBI had “reopened” the Clinton case as the crowd launched into chants of “Lock her up!”

“I have great respect for the fact that the FBI and the Department of Justice are now willing to have the courage to right the horrible mistake that they made,” Trump said.

Clinton’s running mate, Virginia Sen. Tim Kaine, declined to comment on the development on Friday, telling reporters at a campaign stop in Tallahassee, Florida, “I’ve got to read a little more.”

But Clinton’s campaign manager, John Podesta, said the FBI should be more forthcoming.

“FBI Director Comey should immediately provide the American public more information than is contained in the letter he sent to eight Republican committee chairmen,” Podesta said in a statement.

Podesta said characterizations that the agency is “reopening” the investigation do not match Comey’s words. “Director Comey’s letter refers to emails that have come to light in an unrelated case, but we have no idea what those emails are and the director himself notes they may not even be significant,” he said. 

The New York Times quoted law enforcement officials saying the new emails were discovered after the FBI seized electronic devices belonging to Huma Abedin, a top aide to Clinton, and her estranged husband, former New York Rep. Anthony Weiner, in connection with an investigation into illicit text messages Weiner sent to a 15-year-old girl.

Also Friday, conservative watchdog organization Judicial Watch filed a lawsuit requesting records of the meeting between Clinton’s husband, former President Bill Clinton, and Attorney General Loretta Lynch that occurred before the FBI dropped the case. 

Hillary Clinton’s use of a private email server during her tenure as secretary of State has led to numerous Republican accusations and claims that she should be charged and arrested. Cries of “Lock her up” were heard at many points during the Republican National Convention in Cleveland this summer and Trump said, in their second debate, that she would be in jail if he were in charge.