Facebook Inc. took down 583 million fake profiles in the first three months of the year, usually within minutes of their creation, scrubbed 837 million pieces of spam and acted on 2.5 million instances of hate speech, it said on Tuesday in its first report on how effectively it is enforcing community standards.

The social network came under intense scrutiny earlier this year over the use of private data and the impact of harmful content on its 2.2 billion monthly users, with governments around the world questioning the company's policies.

The report, which will come out twice a year, can also show how well Facebook's artificial intelligence systems learn to flag items that violate the rules before anyone on the site can see them.