Norway’s economic and environmental crime authority said on Wednesday it has opened a formal corruption investigation into former Norwegian prime minister Thorbjorn Jagland, following information disclosed in recently released U.S. files related to convicted sex offender Jeffrey Epstein.

Norway’s National Authority for Investigation and Prosecution of Economic and Environmental Crime said in a statement that the probe will examine whether Jagland received improper benefits from Epstein, the late U.S. financier who died in prison in 2019.

The investigation will focus on Jagland’s time as chairman of the Norwegian Nobel Committee and as secretary general of the Council of Europe, the agency said. Authorities will seek to determine whether he received gifts, travel funding or loans from Epstein during those periods.

The case was triggered by information contained in documents linked to the Epstein investigation that were recently made public in the United States, the authority added.