DURHAM, N.C. -- The State Board of Elections has voted to extend voting at two precincts in Durham after becoming disrupted Tuesday by software problems and lack of voter authorization forms.

The two precincts, Bethesda Ruritan Club and Cole Mill Road Church of Christ, will stay open until 8:30 p.m. Tuesday night. Voting at six other precincts was extended 20 to 45 minutes, depending on long in the day the precinct was disrupted.

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The Durham County Board of Elections had requested that all eight precincts stay open until 9 p.m.

Board of Elections Chairman William Brian said there is no evidence that voters were turned away elsewhere.

State Board of Elections general counsel Josh Lawson has clarified the problem with Durham County's electronic check-in system for voters. The system incorrectly indicated that scores of people who showed up to vote Tuesday morning had already voted, so the county switched to paper logs to manually check in voters.

Lawson told The Associated Press that about two dozen other counties using the same software hadn't reported problems and that Durham County officials might have failed to clear out caches of votes cast during the primaries.

WRAL contributed to this report.