Facebook has apologized after the case of a hate speech in a probe to remove hate messages posted on social networking website Facebook. This week's investigation by ProPublica has shown that Facebook approved a photograph even after the review, which could have been communal feelings. However, now those photos have been removed. 

The non-profit organization, after reviewing 900 posts, found that despite reviewing the content of Facebook, they have different attitudes towards them despite having similar content and do not always work according to the company's guidelines.

ProPublica has sent a sample of 49 items to Facebook, asking for cleansing on them. Facebook acknowledged its mistake and said that it has made a mistake in censoring it. Most of these were hate messages, which failed to remove Facebook.   

"We're sorry for the mistakes we have made," said Facebook VP Justin Osofsky in a statement. "We must do better." The exec revealed that the social network will up its safety and security team to 20,000 people next year in an effort to better implement its community standards. He added that Facebook deletes around 66,000 posts reported as hate speech each week.   

On top of its fight against misinformation, Facebook has also been adding new tools to combat sensitive material. In April, it introduced a reporting mechanism for revenge porn, and earlier this month it launched features to help you block or ignore harassers.

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