ROCKAWAY TOWNSHIP — The superintendent of the district that is being sued by parents who said nothing was done about cyberbullying against their daughter said the district remains committed to protecting the rights and safety of all students.

Dianne and Seth Grossman announced Tuesday their intent to sue the Rockaway Township district, and went public with details of the bullying against their daughter, 12-year-old Mallory, a cheerleader and gymnast.

Attorney Paul Nagel said the bullying went on for most of the 2016-2017 school year via Snapchat, Instagram, and texting.

"We literally went up the line, starting with guidance counselors, and it fell on deaf ears," Diane Grossman said at a press conference.

She said she was told by the principal the district would "investigate the matter and follow procedure," but the bullying continued.

Mallory Grossman took her own life in June, just before the start of summer vacation. The Morris County Prosecutor's Office said her death remains under investigation and has never disclosed any details.

In a statement on the district website, Dr. Greg McGann said the district had not seen the suit and could not discuss specifics of the case.

"The teachers, staff, and administrators within the Rockaway Township School District are, as they have always been, and will continue to be, committed to protecting the rights and safety for all our students," McGann wrote.

Three or four students were identified as being behind the bullying, according to Nagel.

"We are contemplating an action against their parents as well, for allowing this to go on for months," Nagel said.

Dianne Grossman told CBS News This Morning that when she attempted to speak with the parents, her concerns were dismissed. She also said the school never filed a harassment, intimidation, and bullying report with the state.

If you feel you or someone you know may be in crisis, call the National Suicide Prevention Hotline, 1-800-273-TALK, or the NJ Hopeline, 1-855-654-6735.

Contact reporter Dan Alexander at dan.alexander@townsquaremedia.com.

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