Officials in Lancaster County, Pennsylvania, identified thousands of potentially fraudulent voter registrations made just before the state’s pre-election deadline.

Ray D’Agostino, chairman of the county’s elections board, said two large batches of registrations, totaling about 2,500 applications, showed signs of “apparent incidents of attempted voter registration fraud.”

He said they found inconsistent signatures, duplicate handwriting, invalid addresses or inaccurate driver’s license or Social Security numbers.

“We have an obligation under the election code — not only that but a moral obligation — to investigate any matters of election fraud,” Mr. D’Agostino said.

He said valid registrations in the batches will be processed and added to the rolls so those voters can cast ballots in this year’s elections.

Lancaster has more than 360,000 registered voters on its rolls, and Pennsylvania, considered a key battleground in the presidential election and for control of the U.S. Senate, has more than 9 million statewide.

Officials did not name the two individuals who submitted the batches of registrations.

Mr. D’Agostino said state authorities have been notified of the case.

• Stephen Dinan can be reached at sdinan@washingtontimes.com.