New documents show President Donald Trump asked about U.S. military aid to Ukraine a month before the call with Ukrainian President Volodymyr Zelenskiy that went on to trigger an impeachment investigation.

The heavily redacted emails, obtained under a freedom of information request by the Center for Public Integrity, also show that administration officials ordered a hold on the aid about an hour after the leaders' call on July 25.

Trump asked about a June 19 article in the Washington Examiner newspaper referencing the aid. Michael Duffey, an official at the Office of Management and Budget, wrote to the Pentagon requesting more detail about the funding, according to an email from Duffey to the Pentagon comptroller.