The battleground state of North Carolina removed more than 747,000 people from the state's list of registered voters over the past 20 months, officials said in a press release on Thursday.
The North Carolina State Board of Elections said that of the 747,274 people removed, 89.2% were due to duplicates, an inactive status for not participating in the past two federal elections, or death.
Nine people were identified as possible noncitizens, a number that one state conservative said could be an undercount. While North Carolina requires all voters to be U.S. citizens, proof of citizenship isn't required to register.
The Republican National Committee and the North Carolina Republican Party filed two lawsuits last month asserting that the state processed more than 225,000 voter registration applications without collecting the requisite identification information.
"By failing to collect certain statutorily required information prior to registering these applicants to vote, Defendants placed the integrity of the state's elections into jeopardy," one lawsuit read.
"The best way to make sure there's no noncitizens is to actually require proof of citizenship when you sign up to vote," Jim Womack, who leads the North Carolina Election Integrity Network, told WRAL on Thursday. "Arizona does it. But North Carolina is one of the many states that do not."
North Carolina now has 7.7 million registered voters eligible to vote in November.
North Carolina is one of the seven battleground states that will determine who wins the White House: Republican Donald Trump or Democrat Kamala Harris, who owns a 2-point lead in the state, according to the RealClearPolitics polling average.