"I have grave reservations regarding the practice of issuing visas to terrorist-supporting countries and the INS's inability to track those who come into the country either using a student visa or using fraudulent documents" through a visa waiver pilot program, she said Tuesday.

Feinstein, D-Calif., speaking at a Senate Judiciary subcommittee hearing on terrorism, said that between 1991 and 1996 the State Department issued 9,767 student visas to citizens of Iran, Syria, Sudan, Iraq and Libya.