Official: New FBI tests uncovered 'lesser security transgressions'

WASHINGTON (CNN) -- New FBI lie detector tests, revamped since the arrest of admitted spy Robert Hanssen more than a year ago, have uncovered what the agency calls "lesser security transgressions."

In testimony Tuesday before the Senate Judiciary Committee, Kenneth Senser, FBI assistant director for security, told lawmakers that no serious internal security was compromised as a result of information gathered from about 700 polygraphs administered since Hanssen's February 2001 arrest.

Senser said the unspecified "security transgressions" were referred to the FBI's Office of Professional Responsibility.

EXTRA INFORMATION In-depth Special: The case against Robert Hanssen

FBI officials said they have been aggressive about tightening internal security and revamping the agency to improve communication and coordination in counterespionage matters.

Also Tuesday, former FBI and CIA Director William Webster told the Senate panel "internal security was a low priority" and fallout from the Hanssen case was "a wake-up call" to rebuild security systems at the FBI.

Webster chaired a commission that detailed the FBI's past security problems.

Hanssen pleaded guilty to selling sensitive U.S. secrets to Russia and the former Soviet Union for nearly two decades. He awaits federal sentencing.