A New Jersey school district on Tuesday rejected accusations by a Muslim teacher that she was fired because of her religion as “brazenly false” and “frivolous.”

In a statement, the Hunterdon County district said Sireen Hashem was not fired from Hunterdon Central Regional High School, but simply did not have her contract renewed, for reasons “that were fully and clearly explained to her and her representation.”

“Those reasons were not related to religion, national or any other improper factor,” it added.

A spokeswoman did not respond to a request on Wednesday for further details, but the statement said, “The board and the administration respect and embrace the diversity of the district’s employee and student population, and value the relationships it enjoys amongst persons of all faiths.”

Omar T. Mohammedi, Ms. Hashem’s lawyer, says that the school never explained its reasons for ending her employment. She began working at the school in January 2013, teaching history and social studies, and, according to her complaint, received the first notice that her contract would not be renewed last April.