SAN FRANCISCO — Facebook allowed advertisements targeted at people who have expressed interest in anti-Semitic topics such as “jew hater,” “how to burn jews” or “History of ‘why jews ruin the world,'” Pro Publica reported Thursday.

Pro Publica paid $30 to reach nearly 2,300 people with these interests through three “promoted posts.” It says Facebook approved all three ads within 15 minutes.

After the news organization contacted the giant social network, Facebook removed the anti-Semitic categories.

Most of Facebook’s ads are placed through an automated system that allows marketers to select who they’d like to reach. Facebook says it will explore ways to fix the problem such as limiting the number of fields available or adding more reviews of fields when people create ads.