A new study reported that white supremacist groups are thriving on Facebook , despite repeated assurances from the company that it doesnt allow extremists on its platform.

The watchdog group Tech Transparency Project released a study Thursday that found more than 100 white supremacist groups had a presence on Facebook.

Project researchers identified 221 white supremacist groups using information collected by Southern Poverty Law Center and the Anti-Defamation League , two of Americas most prominent anti-hate organizations and searched for those groups on Facebook.

About 50% of the groups were present on the platform, the study said.

Of the 113 white supremacist groups the project found on Facebook, 36% had pages or groups created by active users. The remaining 64% had a page auto-generated by Facebook itself.

With millions of people now quarantining at home and vulnerable to ideologies that seek to exploit peoples fears and resentments about COVID-19, Facebooks failure to remove white supremacist groups could give these organizations fertile new ground to attract followers, TTPs study said.