Washington ? Roger Clemens’ denial of steroid use warrants further investigation, Congress said Wednesday in asking the Justice Department to determine whether the star pitcher lied under oath in testimony to a House committee.

House Oversight and Government Reform Committee chairman Henry Waxman and ranking Republican Tom Davis sent a letter to Attorney General Michael Mukasey, urging more scrutiny of Clemens’ statements in a Feb. 5 sworn deposition and at a Feb. 13 public hearing where he said he “never used anabolic steroids or human growth hormone.”

“That testimony is directly contradicted by the sworn testimony of Brian McNamee, who testified that he personally injected Mr. Clemens with anabolic steroids and human growth hormone,” the congressmen wrote.

“Mr. Clemens’s testimony is also contradicted by the sworn deposition testimony and affidavit submitted to the committee by Andrew Pettitte, a former teammate of Mr. Clemens.”

Clemens declined to comment Wednesday when approached by reporters at the Houston Astros’ spring training camp in Kissimmee, Fla.

“Now we are done with the circus of public opinion, and we are moving to the courtroom,” Clemens’ lead lawyer, Rusty Hardin, said in a telephone interview with the Associated Press. “Thankfully, we are now about to enter an arena where there are rules and people can be held properly accountable for outrageous statements.”