Voting machines were down Tuesday morning across Mercer County, leaving voters to fill out paper provisional ballots.

In a message on the county's Facebook page, the Board of Elections said it is working with Dominion, the manufacturer of the voting machines, to resolve the issue.

The Board of Elections did not disclose what caused the machines to be unusable.

"Due to a Mercer County-wide system outage, all voting machines are currently down in each district across the County," West Windsor Township Clerk Gay Huber wrote in a message. "Voters can still report to their respective polling locations and vote on a standard ballot and insert their ballot into the emergency slot in the machine."

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A county spokeswoman on Tuesday morning did not respond to our request for more information.

The polls opened at 6 a.m. Tuesday morning across the state.

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