Lori Berenson, 40, of New York had been released on parole in May for good behavior behind bars but the court ruled she is to be returned to prison to complete five years remaining on her 20-year sentence, The New York Times reported.
The court revoked her parole, saying authorities hadn't been able to verify addresses in Lima Berenson had provided. She had recently moved into an apartment with her son, who was born about year ago while she was in prison, and was to work as a baker, the Times said.
Berenson was arrested in Peru in 1995 for her association with members of a group called Tupac Amaru Revolutionary Movement, which a year later stormed the Japanese Embassy in Lima and took hundreds of diplomats and senior government officials hostage.
Berenson acknowledged in court Monday she had worked with the group, but denied participating in violent activities.
"If my participation contributed to societal violence I am very sorry for this," she said at the hearing.