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Facebook CEO Mark Zuckerberg.
Facebook revealed on Monday that 10 million of its users saw the roughly 3,000 ads it said were linked to Russia.
Elliot Schrage, the company's VP of policy and communications, said in a blog post that 44% of the ads were seen before the US 2016 presidential election and that 56% were seen after the election.
On Monday Facebook handed over the ads and information about how they were targeted to government investigators responsible for probing Russia's interference with US elections.
This story is developing. Check back for updates.