A Twitter account that tweeted a call to violence and claimed to be representing the position of “Antifa” was in fact created by a known white supremacist group, Twitter said Monday. The company removed the account.

“This account violated our platform manipulation and spam policy, specifically the creation of fake accounts,” a Twitter spokesperson said in a statement. “We took action after the account sent a Tweet inciting violence and broke the Twitter Rules.”

Although the account only had a few hundred followers, it is an example of white supremacists seeking to inflame tensions in the United States by posing as left-wing activists online.