The impact of the leaked documents from a Panamanian law firm is snowballing, with Iceland facing a political crisis after its prime minister stepped aside on Tuesday following revelations about his wife's finances.

Recently elected Infantino joined a growing list of public figures and political leaders whose financial arrangements have come under scrutiny after the release of the 11.5 million documents, which have caused public outrage over how the rich and powerful can hide money to avoid taxes.

Infantino said he was "dismayed that his integrity was being doubted" by media reports which said the contract he signed several years ago as a UEFA official sold broadcast rights at a low price to a company which sold them on at a far higher price.

Reuters, which has not seen the documents, was unable to confirm this and UEFA denied that the rights were sold at below the market price.

"UEFA can confirm that today we received a visit from the office of the Swiss Federal Police acting under a warrant and requesting sight of the contracts between UEFA and Cross Trading/Teleamazonas," UEFA said in a statement.

Infantino said in a FIFA statement the contract had been "properly conducted" by UEFA.

British Prime Minister David Cameron also faced another day of questions about his finances, because his late father was among the tens of thousands of people named in the documents from law firm Mossack Fonseca, which has denied any wrongdoing.

After having at first described it as a private matter, Cameron's office said on Tuesday that he and his family did not benefit from any such funds at present. Cameron also said he did not own any shares or have any offshore funds.

But his failure to say whether he or his family would benefit in future only intensified media speculation, with the story splashed across many newspaper front pages on Wednesday.

"There are no offshore funds or trusts which the prime minister, Mrs Cameron or their children will benefit from in future," a spokesman for Cameron said on Wednesday.

INVESTIGATIONS

Among those named in the documents are friends of Russian President Vladimir Putin, relatives of the leaders of China, Britain and Pakistan, and Ukrainian President Petro Poroshenko.

(reuters.com)