Facebook, Google and Twitter ramped up their endeavors to fight fake news ahead of elections previous month, however “more needs to be done” in the midst of continuing threats from Russia, EU officials stated Friday.

In a joint statement and record, the EU revealed proof of “coordinated inauthentic behavior” like bots and false accounts trying to scatter divisive content on online platforms ahead of the European Parliament elections at the end of May.

Social media platforms like Facebook, YouTube and Twitter have confronted backlash from lawmakers around the world for failing to contain the spread of fake information in election campaigns.

The EU asserted that in the days preceding elections, more than 600 groups and Facebook pages across Germany, France, Italy, the U.K., Poland, and Spain were recorded to have spread disinformation and hate speech. It said these pages created 763 million user views.

Facebook has been intensifying its fight against fake accounts in recent months. In May, the firm reported it removed 2 .2 billion fake accounts in the initial quarter of 2019, nearly double the amount from the prior quarter. Facebook also toughened its requirements around political advertising on the platform ahead of EU elections.

“Although Facebook lengthened its transparency to issue-based ads and Google and Twitter did not, questions remain about the efficiency of the transparency measures taken by all signatories,” the EU report stated.

Facebook, Google and Twitter agreed to an EU “Code of Practice on Disinformation ” in 2018, making obligations to send monthly reports on their efforts to eradicate fake news ahead of the election.