MILLBURN, NJ -- An internal investigation into allegations of a sexual nature at Glenwood Elementary school has found no evidence to substantiate the claims, Millburn Schools Superintendent Dr Christine Burton said in a statement Monday at the board of education meeting.

The district had hired an independent law firm, Jackson Lewis P.C. to conduct a third-party investigation into anonymous letters that were sent to as many as 60 families alleging sexual abuse by a “group of adults” at the elementary school.

Here’s the statement from Dr Burton:

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"The Board’s investigation of the allegations of an incident of a sexual nature at Glenwood Elementary School was recently completed.  The independent law firm that was authorized by the Board to conduct the investigation interviewed more than 50 individuals.  The investigation found that the allegations of an incident of a sexual nature were not substantiated.  No evidence was presented that established any current member of the Glenwood School faculty engaged in conduct of an inappropriate, sexual nature.  Given the lack of credible evidence the investigation did not include an interview of prior members of the Glenwood faculty.  We appreciate your patience while the Board’s investigation was ongoing.  The Board and the Millburn Police Department will continue to collaborate to maintain a safe learning environment for our students."

The Millburn Police department’s investigation into the matter is ongoing, district communications officer Nancy Dries confirmed on Wednesday. The Police department is working with postal investigators and other law enforcement officers, but with no alleged perpetrator or victim, the authorities have said that they do not consider the allegations to be credible.