Newly filed court documents confirm that Fusion GPS, the company mostly responsible for the controversial “Trump dossier” on presidential candidate Donald Trump, made payments to three journalists between June 2016 until February 2017.

The revelation could be a breakthrough for House Republicans, who are exploring whether Fusion GPS used the dossier, which was later criticized for having inaccurate information on Trump, to feed anti-Trump stories to the press during and after the presidential campaign. The three journalists who were paid by Fusion GPS are known to have reported on “Russia issues relevant to [the committee’s] investigation,” the House Intelligence Committee said in a court filing.