He was reassigned last summer to the FBI's human resources department after the Justice Department's inspector general began looking into the text messages, the papers said, quoting several unidentified people familiar with the matter.
Strzok also worked on the FBI investigation previous year into whether then-Democratic presidential nominee Hillary Clinton mishandled classified information through her use of private email servers while Secretary of State.
The Timesreported "Strzok and a colleague reacted to news events, like presidential debates, in ways that could appear critical of Mr. Trump".
ABC News reported back in August that Strzok had left the investigation, but said at the time "it's unclear why Strzok stepped away from Mueller's team of almost two dozen lawyers, investigators and administrative staffers". "Just more Fake News covering another Comey lie!"
A lawyer for Mr. Strzok declined to comment.
YouTube Reels is the platform's own version of Stories Unlike stories found on other apps, these Reels don't expire, so your fans will be able to access them whenever they'd like. The Community was introduced previous year , aiming to make the platform bit more engaging for both creators and viewers.
The precise content of Strzok's text messages is unknown, and it remains unclear whether Horowitz will make them public.
Justice Department spokeswoman Sara Isgur Flores said in an email that "we disagree with the chairman's characterization and will continue to work with congressional committees to provide the information they request consistent with our national security responsibilities".
Mueller is overseeing the FBI's investigation into Russian meddling in the 2016 presidential election and possible coordination with the Trump campaign.
The department has already provided members of House leadership and the Intelligence Committee with "several hundred pages of classified documents" and multiple briefings - including whether any Federal Bureau of Investigation payments were made related to the dossier, and has cleared witnesses including McCabe and Strzok to testify, she said. Some conservatives encouraged Mr. Trump to fire Mr. Mueller, saying the investigation was tainted.
The inquiry into Mr. Strzok is being conducted by the Justice Department's inspector general, Michael E. Horowitz, who is leading a broad examination of how the F.B.I. handled the Clinton email investigation.
Tiger Woods ties for the lead
Tiger Woods has finished the first round of his return to professional golf at the Hero World Challenge after 301 days away. His first birdie came on the first when a 96-yard approach shot landed five feet from the hole for a simple birdie putt.
With Sauber's confirmation, just one F1 seat remains for 2018
It's believed that Ferrari had been pressing for another of their development drivers, Antonio Giovinazzi, to take the race seat. Sauber has unveiled its concept livery for the 2018 Formula 1 season, in the wake of its collaboration with FCA brand Alfa Romeo.
War criminal Praljak claims to ingest poison, dies
Ratko Mladic of genocide and other crimes, was set up in 1993, while fighting still raged in the former Yugoslavia. At the same time, Dutch police have declared the courtroom where Praljak drank poison a crime scene.
BMW's all-new i8 Roadster makes LA debut
However, both have an improved electric range - the Coupe can travel 55km on electric power only, while the Roadster can do 53km. Components on the new i8 Roadster's convertible roof mechanism are made out of aluminum using a new 3D printing process.