Manafort spokesman Jason Maloni confirmed that the raid, first reported by the Washington Post report, had taken place, as reported by Reuters.
The predawn raid was conducted at Manafort's home in the Washington suburb of Alexandria without advance warning on July 26, a day after Manafort had met with staff members of the Senate Intelligence Committee, the Post said, citing unidentified people familiar with the probe.
Read alsoRussia collusion probe entering new phase in U.S. as grand jury impaneled"FBI agents executed a search warrant at one of Mr. Manafort's residences. Mr. Manafort has consistently cooperated with law enforcement and other serious inquiries and did so on this occasion as well," Maloni said in an email.
The search warrant was wide-ranging and FBI agents working with special counsel Robert Mueller departed the home with various records, the Post reported.
The Federal Bureau of Investigation did not immediately return a request for comment on the report. Joshua Stueve, a spokesman for Mueller's office, declined to comment.