Federal agents in Panama have raided the offices of the Mossack Fonseca law firm, which is linked to a number of offshore accounts associated with world leaders.
Panama's attorney general said in a statement that prosecutors and police were searching for any evidence that would establish the possible use of the firm for "illicit activities." Mossack Fonseca has been accused of aiding tax evasion and fraud.
The officers converged on company headquarters late Tuesday to search the offices for evidence supporting the charges. Meanwhile the law firm posted on its Twitter feed that it "continues to cooperate with authorities" in the investigations.
The so-called "Panama Papers," leaked online more than a week ago, featured records from Mossack Fonseca that indicated it had set up offshore tax havens for a number of wealthy international clients.
Company founder Ramon Fonseca has said that the company has broken no laws and destroyed no documents.
The clients include Ukraine's President Petro Poroshenko, friends of Russian President Vladimir Putin; and relatives of British Prime Minister David Cameron, Pakistani Prime Minister Nawaz Sharif; and China's President Xi Jinping.