Best News: Worldwide, jaws drop to 'Panama Papers' leak

An anonymous person leaked 11 million documents describing how the world's rich and powerful hide money in offshore tax havens.Video provided by Newsy Newslook

Sunday's jaw-dropping "Panama Papers" leak, which shows a global network of offshore companies helping the wealthy hide their assets, is already being called "the Wikileaks of the mega-rich."

The hashtag #panamapapers topped Twitter on Sunday afternoon. Among those reacting through tweets: Edward Snowden, the 2013 CIA leaker, who said the "Biggest leak in the history of data journalism just went live, and it's about corruption."

In Russia, President Vladimir Putin's spokesman, Dmitry Peskov, told reporters that the Kremlin had already received "a series of questions in a rude manner" from an organization that he said was trying to smear Putin.

"Journalists and members of other organizations have been actively trying to discredit Putin and this country's leadership," Peskov said.

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Panama Papers explainer: What you should know

The Washington, D.C.-based International Consortium of Investigative Journalism (ICIJ) said the trove of 11.5 million records details the offshore holdings of a dozen current and former world leaders, as well as businessmen, criminals, celebrities and sports stars. The data span nearly 40 years, from 1977 through the end of 2015, ICIJ said, allowing "a never-before-seen view inside the offshore world — providing a day-to-day, decade-by-decade look at how dark money flows through the global financial system, breeding crime and stripping national treasuries of tax revenues."

Jim Clarken, the CEO of Oxfam Ireland, tweeted: "As long as tax dodging continues to drain government coffers, there is a human cost."

In Australia, the country's tax office said it was investigating more than 800 wealthy clients of the Panama law firm Mossack Fonseca for possible tax evasion, Reuters reported.

The Australian Tax Office (ATO) said it had linked more than 120 of the clients "to an associate offshore service provider located in Hong Kong." ATO Deputy Commissioner Michael Cranston said his office was working with the Australian Federal Police, the Australian Crime Commission and anti-money laundering regulator AUSTRAC.

Iceland's prime minister, one of several major politicians with alleged links to secret "shell" companies, was expected to face calls for a snap election, Britain's Guardian reported.

"As long as tax dodging continues to drain government coffers, there is a human cost" - @JimClarken on #PanamaPapers https://t.co/bmC7qxMG9E
— Oxfam Ireland (@OxfamIreland) April 3, 2016

For a few moments, it actually looked as if Prime Minister Sigmundur Gunnlaugsson had resigned outright. The confusion happened when Gunnlaugsson's predecessor called on him to step down — Google translated the Icelandic "must resign" as "will immediately resign."

The leaked records show that Gunnlaugsson co-owned a company set up in 2007 on the Caribbean island of Tortola, in the British Virgin Islands, to hold investments with his wealthy partner, Anna Pálsdóttir, whom he later married.

Gunnlaugsson on Sunday walked out of an interview with Swedish TV broadcaster SVT, saying, "What are you trying to make up here? This is totally inappropriate," The Guardian reported.