MINEOLA, N.Y. — A priest and former president of a prestigious Catholic high school on Long Island has been suspended after allegations of sexual abuse of a minor were deemed "credible."

The Marianist order, also known as the Society of Mary, made the announcement Friday on the website of Chaminade High School.

The Marianist statement said a "comprehensive investigation" was conducted by the order.

Williams was a member of the Chaminade faculty an administration from 1991 to 2012. He resigned as president in 2011. He was replaced by Brother Thomas Cleary, who is currently the school's president.

According to the statement on Chaminade's website, Williams' clerical faculties have been suspended and he cannot publicly function as a priest. The case will be submitted to the Holy See for final resolution.

"It is important to note that Fr. James has completely denied the allegations," said the Marianist.

The Marianists said they have contacted the Nassau County district attorney and the Diocese of Rockville Centre about the allegations. They did not elaborate.

The school says they will "continue to remain vigilant in our efforts to enforce these effective safeguards."

Williams could not be reached Saturday. There was no immediate information on a lawyer who could comment on his behalf.

The Associated Press contributed to this report.