‘US President Donald Trump has accused the media of bias over a continuing “Russia hoax.” The statement comes on the heels of a Facebook investigation into alleged Russia-linked ads on the social network during the 2016 presidential campaign.

“The Russia hoax continues, now it’s ads on Facebook,” Trump tweeted on Friday. “What about the totally biased and dishonest Media coverage in favor of Crooked Hillary?”

On Thursday, Facebook founder and CEO Mark Zuckerberg said that the company will release to US Congress the activity it uncovered concerning “fake accounts linked to Russia running ads” during the US 2016 presidential campaign.’

Read more: Facebook admits it works with government, as efforts to blame Russia for everything intensify