San Fransisco ? Barry Bonds will testify in December before a federal grand jury probing a laboratory that supplies some of the nation’s top athletes with nutritional supplements.

The San Francisco Giants slugger is one of several dozen athletes who have been subpoenaed by the panel. Others include New York Yankees slugger Jason Giambi, sprint champion Kelli White and U.S. shot put champion Kevin Toth.

Bonds’ attorney, Mike Rains, said Tuesday that his client received a subpoena about a month ago asking him to appear Dec. 4. Rains said he was told by the prosecutor leading the investigation that “Barry is a witness and not a target of the grand jury.”

The company at the center of the investigation is the Bay Area Laboratory Co-Operative, or BALCO, which was raided by the Internal Revenue Service and drug agents in September. An attorney for BALCO founder Victor Conte confirmed Monday his client was the target of the grand jury probe.

The scope of the investigation is unclear, and federal officials have refused to comment.

Meanwhile, Conte has been accused by the U.S. Anti-Doping Agency of supplying athletes with a new designer steroid that is rocking the world of track and field.

Bonds has been a BALCO client since 2000, and in the June issue of Muscle & Fitness magazine credited Conte for a personalized program that includes nutritional supplements.

The home of Bonds’ personal trainer, Greg Anderson, was raided last month in conjunction with the raid on Conte’s lab.

“When Barry gets a grand jury subpoena and his trainer’s door gets kicked in by drug enforcement agents, that’s when I get involved,” Rains told the Associated Press in a telephone interview Tuesday.