Law enforcement authorities in the US are investigating the disclosure of tax records cited in a media report showing some of America's richest people paid little to no taxes. 

US media outlet ProPublica said it obtained Internal Revenue Service data indicating billionaires, including Amazon founder Jeff Bezos and Tesla's Elon Musk, paid no federal income taxes during some years.

The matter has been referred to the FBI and is a matter White House Press Secretary Jen Psaki says, the US government is taking very seriously