The imprisoned ex-president of Peru has been hospitalized because of a relapse in his battle with tongue cancer.

Alberto Fujimori, who is serving a 25-year jail term for corruption and rights abuses, was transferred Thursday to a hospital where he is expected to stay for at least three days.

Fujimori underwent his fourth tongue cancer surgery earlier this year.

Fujimori's daughter, Keiko, lost Peru's presidential runoff election Sunday.

Fujimori held power from 1990 until 2000.

He fled to Japan – the birthplace of his parents – during a corruption scandal in 2000.

Fujimori was arrested five years later when he traveled to Chile in an attempt to stage a political comeback. The Chilean Supreme Court eventually ruled that he should be extradited to Peru to face charges. He was sent back to Peru in 2007.