A Maltese journalist, who was part of the group that broke the Panama Papers story, had four posts relating to alleged corruption by his country's prime minister and his associates deleted by Facebook and his account blocked.
The posts were deleted for violating Facebook's community standards, according to Matthew Caruana Galizia, who won a Pulitzer for his work on the Panama Papers story.
He told The Guardian: "For me, this process was enlightening because I realised how crippling and punitive this block is for a journalist."
The posts that were deleted contained details of alleged wrongdoing by Maltese Prime Minister Joseph Muscat, his chief of staff Keith Schembri and Energy Minister Konrad Mizzi.
{loadposition sam08}Illustrating these posts were images from the Panama Papers, a total of 11.5 million documents from the offshore law firm Mossack Fonseca.
Matthew and a team from the International Consortium of Investigative Journalists won a Pulitzer for their reporting on the Panama Papers.
Facebook has come under the microscope after the US election went Donald Trump's way and it was found that numerous bogus posts had been posted on the social media giant.
Malta goes to the polls on 3 June amidst political turmoil.
The Panama Papers claimed that both Muscat and Schembri had set up shell companies in Panama.
Both survived this scandal but another investigative journalist, Daphne Caruana Galizia, the mother of Matthew, wrote a story in April alleging that another shell company belonging to Muscat's wife had been used to accept payments. She has been sued by Mizzi and Schembri over these allegations.
Matthew started publishing stories on Facebook about Maltese politicians and offshore companies this month, including documents from the Panama Papers.
Muscat announced he would be suing Matthew and on 16 May the latter was locked out of his Facebook account.
Facebook has said it is investigating to find out how the censorship occurred. In 2016, the company deleted a picture of a naked child fleeing a napalm attack during the Vietnam War, leading to an outcry about its policies on publishing.