Facebook has taken ads from the campaign team of US President Donald Trump offline for violating Facebook's hatred policy. The advertisements depicted an inverted red triangle, a symbol used by Nazis in World War II to denote political prisoners.

A Facebook spokesperson confirmed to CNN on Thursday that using the symbol for Facebook was the reason for removing the ad. "Our policy prohibits the use of the symbol of a prohibited hate group to identify political prisoners if that symbol is not further discussed or condemned."

The ads addressed "dangerous gangs of far-left groups" that would cause chaos on the streets of the United States. Citizens were asked to sign a petition against the anti-fascist political group Antifa. At the bottom of the messages was an image of the inverted red triangle.

Social media has previously been critical of the ads. Trump's campaign team responded via Twitter that the red triangle would be widely used by Antifa himself.

@MelissaRyan This is an emoji. It's also a symbol widely used by Antifa. It was used in an ad about Antifa. It is not in the ADL's Hate Symbols Database.

AvatarAvatar Author TrumpWarRoomMoment of places15: 25 - June 18, 2020

Facebook previously took no action on a controversial post

Facebook was criticized earlier this month for not taking action against a controversial message from Trump. In the report, Trump threatens to use violence against protestors in Minneapolis who took to the streets after the death of a black unarmed American by a white police officer. "When the looting starts, the shooting begins," the US President wrote.

Facebook had decided that the message could remain on the platform and took a different approach than competitor Twitter, where the threat was shielded. That position has led internally to employee protests.