(Bloomberg) -- Geneva prosecutors opened a criminal probe following a complaint filed by Mossack Fonseca, the Panamanian law firm at the heart of the Panama Papers scandal that led to revelations about how the world’s rich hide their money.

The probe is being led by prosecutor Claudio Mascotto, his spokesman said. Le Temps reported earlier on Tuesday that an IT technician at the Geneva office of Mossack Fonseca has been arrested by Geneva police a few days ago, on suspicion of leaking massive amounts of confidential data.

A series of reports in April based on millions of documents leaked from the law firm revealed how it worked with some of the world’s biggest banks to create offshore shell companies for world leaders, athletes and other rich clients. The revelations led to the resignation of Icelandic Prime Minister Sigmundur David Gunnlaugsson and put British leader David Cameron on the defensive about his family’s finances.

No one answered the phone at Mossack Fonseca’s Geneva office during regular office hours.

To contact the reporter on this story: Hugo Miller in Geneva at To contact the editors responsible for this story: Anthony Aarons at

©2016 Bloomberg L.P.