Suspense and uncertainty now hang over the supertight U.S. Senate race, which has Democrat Kyrsten Sinema and Republican candidate Martha McSally separated by just 9,610 votes, according to updated election results.

The results were updated after 5 p.m. Thursday, the first time since election night that the tallies had been substantially updated.

Sinema was leading as of 6:20 p.m. She had 932,870 votes,representing 49.10 percent of the total reported votes while McSally had 923,260 votes, or 48.59 percent. Green Party candidate Angela Green had earned 43,838.

It’s too soon to know who will ultimately prevail.

With tens of thousands of outstanding ballots, the campaign managers for both teams conveyed confidence, with each saying the remaining ballots would favor their candidate.

After Sinema’s lead widened Thursday, McSally’s campaign manager, Jim Bognet, predicted Sinema’s lead would “disappear.” In a written statement, he said outstanding ballots in Maricopa County arrived on days when early GOP turnout was higher than the votes reflected in Thursday’s results.