San Francisco ? Tim Montgomery testified last year that he used human growth hormone and an undetectable steroid, and that the man at the center of a Bay Area steroid scandal told him he supplied Barry Bonds with performance-enhancing drugs, the San Francisco Chronicle reported.

The newspaper’s report Thursday includes direct quotes from Montgomery’s testimony to the federal grand jury that investigated the Bay Area Laboratory Co-Operative. The Chronicle did not say how it obtained the information. It is illegal to give grand jury testimony to the media.

Montgomery, the world’s fastest man, was told Wednesday by the U.S. Anti-Doping Agency that he faced a lifetime ban from the sport. He has publicly denied using any performance-enhancing drugs.

His lawyer lashed out at the leak of his secret testimony. Montgomery was among dozens of elite athletes — including Bonds, Jason Giambi and Montgomery’s girlfriend, Olympian Marion Jones — who answered the grand jury’s questions.

“No one can legally or legitimately have Tim’s grand jury testimony, and if they think they have it, I would like to see it,” attorney Cristina Arguedas told the Chronicle. “Otherwise, there’s no way I can respond to these blind allegations, and I’m not going to comment on it.”

Montgomery reportedly testified Nov. 6, 2003, that in 2001, BALCO founder Victor Conte gave him weekly doses of human growth hormone and a substance called “the clear” — which Montgomery referred to as a “magic potion.”

Montgomery said he was told “the clear” was not an illegal steroid, but that he understood that HGH was a banned substance. Montgomery set a world record of 9.78 seconds in the 100 meters in 2002.

Montgomery also gave secondhand testimony implicating Bonds, the San Francisco Giants’ slugger who has hit the third most homers in baseball history. According to the Chronicle, prosecutor Jeff Nedrow asked Montgomery about Conte’s dealings with Bonds.

“Did he say he gave any steroids, Winstrol or any of the other ones to Mr. Bonds?” Nedrow asked.

“Yes, he did,” Montgomery replied.

“Did he say specifically which ones?”

“Winstrol,” Montgomery said.

Winstrol is the same steroid Ben Johnson used before being disqualified in the 1988 Olympics. Montgomery testified that Conte told him Bonds switched to an undetectable steroid in 2003 when baseball introduced its drug policy.

“I have reason to have serious doubts about the accuracy of all that,” Bonds’ attorney, Michael Rains, told the Chronicle. “I doubt very much that Conte would be talking about anything he’s giving to anybody.”

A message left by The Associated Press at Rains’ office wasn’t returned.

“The clear” was later determined to be THG, a previously undetectable steroid at the center of the BALCO scandal, which now threatens to keep some of America’s top sprinters out of the Athens Olympics.