Comey, in his letter, said the new emails "appear to be pertinent" to the earlier investigation.
Comey said the new emails "appear to be pertinent", but he and his officials had not yet examined them.
"In connection with an unrelated case, the FBI has learned of the existence of emails that appear to be pertinent to the investigation," Comey wrote.
"If we are correct about the depth of the rightward turn, then our interventions need to be pertinent, decisive and effective.
"FBI Dir just informed me, 'The FBI has learned of the existence of emails that appear to be pertinent to the investigation,' " Chaffetz's tweet said.
"FBI Dir just informed me, 'The FBI has learned of the existence of emails that appear to be pertinent to the investigation,' " Chaffetz's tweet said.
James B. Comey, then the F.B.I. director, notifies Congress that new emails have surfaced appearing to be "pertinent" to the Hillary Clinton email investigation.
In his letter on Friday, Comey wrote, "In connection with an unrelated case, the FBI has learned of the existence of emails that appear to be pertinent to the investigation.
Hillary Clinton called on the FBI to "immediately" explain its review of a new batch of emails the agency said appeared to be pertinent to the previous investigation into her use of a private server.
It is worth noting, at the outset, that Comey's letter said only, "In connection with an unrelated case, the FBI has learned of the existence of emails that appear to be pertinent to the investigation".
This model has been built by following the rules established by Curran and co-workers for the oxidation of n-heptane and it includes all the reactions known to be pertinent to both low and high temperatures.
