Some of the groups even planned to attend the rallies with weapons, company officials said Friday.
The accounts on Facebook and Instagram were tied to the Proud Boys and the American Guard, two hate groups already banned on the platforms, AP reported.
Officials were already monitoring the accounts in preparation for removing them when they saw posts attempting to exploit the ongoing protests prompted by the death of George Floyd in Minneapolis.
“We saw that these groups were planning to rally supporters and members to physically go to the protests and in some cases were preparing to go with weapons,” said Brian Fishman, Facebook’s director of counterterrorism and dangerous organizations policy.
The company did not divulge details of the account users — such as their specific plans for protests or where in the US they live.
It said “approximately” 190 accounts were removed overall.
Both the Proud Boys and American Guard had been banned from Facebook for violating rules prohibiting hate speech.
Facebook said it will continue to remove new pages, groups or accounts created by users trying to circumvent the ban.
Earlier this week, Facebook announced the removal of a “handful” of other accounts created by white supremacists who had been posing on Twitter as members of the far-left antifa movement.