The US Senate race in Georgia will be settled in a runoff election next month after neither Sen. Raphael Warnock, the Democratic incumbent, nor Herschel Walker, his Republican challenger, failed to win a majority of the vote in one of the highest-profile contests in the country.

“While county officials are still doing the detailed work on counting the votes, we feel it is safe to say there will be a runoff for the US Senate here in Georgia slated for December 6,” Gabriel Sterling, chief operating officer in the Georgia Secretary of State’s office tweeted early Wednesday.