Facebook will ban new political ads for the week leading up to Election Day, Nov. 3, and remove posts that try to suppress or discourage voting, the company’s CEO Mark Zuckerberg announced Thursday.

The measures also aim to prevent campaigns and their supporters from making premature claims of victory, a situation some Democrats have described as a doomsday scenario.

The announcement came as part of a series of steps to address concerns about how Facebook could be used to manipulate the election, and included a warning from Zuckerberg about potential unrest around the United States related to the election.