Donald Trump has revoked the press credentials of the Washington Post, describing the newspaper as 'phony and dishonest'.
A number of other prominent US media outlets have already said they have been banned from attending official Trump campaign events.
Mr Trump criticised the Post for a story with a headline 'Donald Trump seems to connect President Obama to Orlando shooting'.
The story referred to an interview on US television following the Orlando shootings, in which Mr Trump said: "People cannot, they cannot believe that President Obama is acting the way he acts and can't even mention the words 'radical Islamic terrorism.' There's something going on. It's inconceivable. There's something going on."
The businessman said the original headline read 'Donald Trump suggests President Obama was involved with Orlando shooting'.
A spokesperson for the Post told The Guardian the headline was changed shortly after it was posted in order to reflect 'more properly' what Mr Trump said. She said the decision was made by the paper itself, without any contact from the Trump campaign.
In a post on Facebook, the presumptive Republican presidential candidate wrote: "I am no fan of President Obama, but to show you how dishonest the phony Washington Post is, they wrote, 'Donald Trump suggests President Obama was involved with Orlando shooting' as their headline. Sad!
"Based on the incredibly inaccurate coverage and reporting of the record setting Trump campaign, we are hereby revoking the press credentials of the phony and dishonest Washington Post," he stated in a second post.
Responding to Mr Trump's decision, the Post's editor Marty Baron said it was "nothing less than a repudiation of the role of a free and independent press".
Mr Baron argued: "When coverage doesn't correspond to what the candidate wants it to be, then a news organisation is banished".
He added that his paper will continue to cover Trump's campaign 'honorably, honestly, accurately, energetically, and unflinchingly'.
Politico reports that the ban on reporters from a major news outlet follows a number of other cases where Trump has revoked press credentials from publications such as Buzzfeed, The Huffington Post and Politico itself.
