DENVER -- The U.S. Olympic Committee will cut off all negotiations for funding with USA Track & Field until it cooperates with the IOC in sprinter Jerome Young's drug case, an Olympic source said Sunday.

The USOC's warning to the track body came in a Dec. 19 letter from USOC president Bill Martin to USATF president Bill Roe and executive director Craig Masback, the source, speaking on condition of anonymity, told The Associated Press.

Young tested positive for steroids in 1999, but was cleared on appeal and went on to win a relay gold medal for the United States at the 2000 Sydney Games.

USATF received $2.8 million from the USOC in 2003 and has asked for more than $3 million this year. Direct funding to athletes -- $945,000 in 2003 -- will not be interrupted under the threatened punishment.

The letter said USATF officials also will be denied access to USOC training facilities, and credential requests for the Athens Games will be suspended. Athletes, coaches and team leaders will still receive credentials for Athens and have use of USOC facilities, the source said.

USATF spokeswoman Jill Geer declined comment Sunday. USOC spokesman Daryl Seibel said his group is still working with USATF to settle the issue.

The possible penalties were first reported in the Los Angeles Times.

The International Olympic Committee has asked USATF to explain why Young was cleared, but has yet to get an answer.

Young and the rest of the 1,600-meter relay team, including Michael Johnson, could be stripped of their medals if the IOC finds Young was improperly cleared.

USATF officials, citing confidentiality rules, have refused to provide details in the case or even acknowledge Young is the athlete in question. USATF also says it is bound by an arbitration court ruling upholding its decision to maintain secrecy on doping acquittals.

In October, Masback and Roe were told by the USOC's executive committee to address recent issues regarding drugs and athletes or face being stripped of its Olympic charter.

USATF sent a 23-page report in November, but USOC officials were not satisfied with the response to the Young case.