LIMA, Peru — Dutch murder suspect Joran Van der Sloot told police investigators he knows the location of the body of missing U.S. teen Natalee Holloway, the chief of Peru's criminal police said.

"He let slip that he knew the place where this person was buried," Gen. Cesar Guardia said.

But, Guardia said, the 22-year-old Dutchman told investigators "he would only testify (on the matter) before Aruba authorities."

Guardia said he didn't know how seriously to take Van der Sloot's statement given his history of dubious statements about the 2005 disappearance in Aruba of the Alabama teen.

Van der Sloot remains the lone suspect in the case, which came up in front of Peruvian police as the Dutchman confessed to killing Stephany Flores, a 21-year-old woman from Lima, Guardia said.

Sheathed in a bulletproof vest, Van der Sloot was moved Thursday across downtown Lima to a cell at the prosecutor's office as officials prepared to file charges in the May 30 killing of Flores, who police say he met playing poker at a casino three days earlier.

Flores was killed five years to the day after Holloway disappeared and prosecutors have until Saturday to file charges in the case.