PITTSBURGH -- Allegheny County police are sifting through voter registration forms in an effort affiliated with a national investigation that has turned up thousands of allegedly fraudulent voter registration forms.

Regulators are paying close scrutiny to registrations submitted by the Association of Community Organizations for Reform Now, or ACORN, a group dedicated to assisting the less fortunate across the country.

“There appears to be a crime,” said Steve Zappala, Allegheny County District Attorney. “Clearly there are people on these applications who have not been solicited or may not exist. They’re forgeries.”

On Wednesday, authorities in Las Vegas raided an ACORN office and confiscated recent voter registration documents.

Distancing itself from the controversy, ACORN said at that time it has zero tolerance for fraudulent registration and will immediately fire anyone engaged in such activity.