Manhattan US Attorney Preet Bharara has opened a criminal investigation on matters related to the Panama Papers and sent a letter April 3 to the International Consortium of Investigative Journalists (ICIJ) saying his office "would greatly appreciate the opportunity to speak as soon as possible." The ICIJ received many such requests from many countries and ICIJ Director Gerard Ryle has said its policy is not to turn over any materials.
The Panama Papers are an unprecedented leak of 11.5m files from the database of the world’s fourth biggest offshore law firm, Mossack Fonseca. The records were obtained from an anonymous source by the German newspaper Süddeutsche Zeitung, which shared them with the International Consortium of Investigative Journalists (ICIJ). The ICIJ then shared them with a large network of international partners, including the Guardian and the BBC.