Facebook is looking to examine British political consulting and data firm Cambridge Analytica’s servers following the UK’s investigation into a massive data breach. The probe resulted in Facebook being fined the equivalent of more than $640,000 Wednesday for failing to protect user data.

A Facebook spokesperson wrote in an email Thursday that, while the company disputes some of the ICO’s findings, it agrees that, “we should have done more to investigate claims about Cambridge Analytica and taken action in 2015.”