Story highlights The remark came at the end of a contentious interview with "Real Time" host Bill Maher

Trump has repeatedly refused to release his tax returns to the public

Washington (CNN) WikiLeaks on Saturday walked back a claim made by its founder, Julian Assange, that it was "working on" obtaining Donald Trump's undisclosed tax returns.

Assange's remark came at the end of a contentious interview Friday with "Real Time" host Bill Maher, during which the two discussed WikiLeaks' recent disclosure of Democratic National Committee emails and voicemails. Assange, who has vowed to release more information to damage Hillary Clinton's campaign, was asked by Maher, a Clinton supporter, whether he plans to similarly disrupt Trump's presidential prospects.

"Why don't you hack into Donald Trump's tax return?" Maher asked.

"Well, we're working on it," responded Assange, who did not provide further information.

But a message from WikiLeaks' official Twitter account Saturday morning dismissed Assange's statement, claiming it was meant in jest.