Mr. Rivera said he would not discuss the accusations because it was an open case.

Afterward, the committee will hold a confidential session with all members of the Senate to discuss the accusations if there were any.

The students did not discuss the accusations with the professors or administrators before acting.

The lawyer, Barbara Van Gelder, would not discuss the accusations further.

Ms. Albright and the other officials did not discuss the specific accusations against the companies or executives, saying they were based on classified intelligence information.

Mr. Kaveladze declined to discuss that or the other accusations in detail.

American officials could not be reached today to discuss the accusations.

Scott Pohl, the president of the Twin Rivers board, said he and other members could not discuss the accusations.

They said the countries would discuss the American accusations at a regular meeting of their bilateral trade committee scheduled for September.

Mr. Perlmutter declined to discuss the accusations against his client, and neither broker returned telephone calls.