A marquee of the Arango Orillac Building lists the Mossack Fonseca law firm, in Panama City, Monday, April 4, 2016. Panama's president says his government will cooperate "vigorously" with any judicial investigation arising from the leak of a vast trove of information on the offshore financial dealings of the world's rich and famous. An international coalition of media outlets Sunday published investigations it said stemmed from the leak of 115 million records kept by the Panama-based law firm Mossack Fonseca on behalf of clients. (AP Photo/Arnulfo Franco)

Panama Papers: Offshore Firm Helped Billionaires Plunder Africa

The plunder of Africa is only the tip of the iceberg, said the investigation: in total, more than 1,400 companies involved in resource extraction were listed in the Mossack Fonseca files.