WASHINGTON — A Senate subcommittee investigating sexual abuse in Olympic and amateur sports has asked the Justice Department and the F.B.I. to investigate Scott Blackmun, the former chief executive of the United States Olympic Committee, claiming that he lied to Congress during its inquiry into how Olympic entities handled the Lawrence G. Nassar molestation case.

Two senators, Jerry Moran of Kansas, the subcommittee’s chairman, and Richard Blumenthal of Connecticut, the ranking member of the subcommittee that holds jurisdiction over the U.S.O.C. and amateur sports, sent referral letters on Friday to Matthew G. Whitaker, the acting attorney general, and Christopher A. Wray, the F.B.I. director, saying Blackmun had “made false claims and misled our subcommittee — harming the investigation and ability to develop policy.”

They added, “Just as importantly, survivors of abuse have had to wait longer for the truth and longer for systemic changes to help prevent others from similar injury.”

The request came three days after Senator Blumenthal formally asked the F.B.I. to look into the role of the U.S.O.C. and U.S.A. Gymnastics in the Nassar case and what he called “their role in this massive cover-up.”