The FBI is probing new emails related to Hillary Clinton, FBI Director James Comey said in a Friday letter to lawmakers. Those new emails were discovered during an FBI investigation in which the devices of former Congressman Anthony Weiner and Clinton aide Huma Abedin were seized, The New York Times reported. The newly discovered emails did not come from her private email server, the Associated Press reported citing a U.S. official.

"In previous congressional testimony, I referred to the fact that the Federal Bureau of Investigation had completed its investigation of former Secretary Clinton's personal email server. Due to recent developments, I am writing to supplement my previous testimony," 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. I am writing to inform you that the investigative team briefed me on this yesterday, and I agreed that the FBI should take appropriate investigative steps designed to allow investigators to review these emails to determine whether they contain classified information, as well as toassess their importance to our investigation," he added.

"Although the FBI cannot yet 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 concluded in the letter addressed to several lawmakers who chaired committees.