The parents of slain federal intern Chandra Levy met yesterday with investigators in Washington to get an update on the case, sources said.

Robert and Susan Levy, accompanied by attorney Billy Martin and private detective Dwayne Stanton, met for several hours with prosecutors, D.C. police and the FBI at the U.S. attorney's office, sources said.

"They came to get an update, and they wanted to know where the grand jury was at," said a source familiar with the probe.

Investigators told the Levys -- who flew in from California on Monday -- that they were actively working on the case and interviewing witnesses, but they gave no indication of any breakthrough, another source said.

Levy, 24, disappeared about May 1, 2001. The case generated worldwide attention after she was romantically linked to Rep. Gary A. Condit (D-Calif.). The adverse publicity damaged Condit politically, and in March he lost a bid for reelection.

Investigators interviewed Condit four times last year, subpoenaed his bank, telephone and credit card records, took a DNA sample and searched his Adams Morgan apartment, but they never produced any evidence to link him to the disappearance.

D.C. police and the FBI in recent months have been looking at a prisoner who is serving a 10-year sentence for attacking two joggers in Rock Creek Park, not far from where Levy's skeletal remains were found in May.

That man, Ingmar A. Guandique, 21, admitted in a plea agreement that he had tried to rob the two women, one of them two weeks after Levy disappeared. At his sentencing in February, D.C. Superior Court Judge Noel A. Kramer said the attacks appeared to be more than attempted robberies.

Last year, an inmate at the D.C. jail told authorities that Guandique told him he had stabbed Levy to death in Rock Creek Park. In the fall of 2001, Guandique passed an FBI polygraph test, and the informant flunked.

But this year, investigators began questioning the reliability of the polygraphs, which were administered through an interpreter, not a bilingual polygrapher.

Police Chief Charles H. Ramsey in September defended the polygraph exams, and a department news release said "it must be noted that there is no evidence . . . that the test was flawed."

Investigators seized some of Guandique's clothing to check for DNA but have found no evidence linking him to Levy's disappearance, sources said.