Facebook has announced that the personal data of 87 million users, mostly in the United States and United Kingdon, may have been improperly obtained by British political consulting firm Cambridge Analytica, 37 million more users than has previously been estimated. 

These new figures were revealed by Facebook’s Chief Technology Officer Mike Schroepfer in a recent announcement of improvements to the platforms privacy tools.

Facebook plans to notify users whose data has been obtained by Cambridge Analytica which worked closed with the Vote Leave campaign in the UK and the Trump campaign in the States.