A group has filed a federal lawsuit accusing a Kansas middle school of violating a student’s free speech rights by prohibiting the student from posting fliers about a prayer event.

The lawsuit was filed in Kansas City, Kan., by the Alliance Defending Freedom, a conservative Christian group that advocates for religious rights.

The suit contends the Robert Clark Middle School in Bonner Springs violated the student’s free speech rights when a counselor prohibited the student from posting fliers containing Biblical references promoting the Sept. 25 prayer event before school.

Bonner Springs School Superintendent Dan Brungardt said Monday the district hasn’t heard about the lawsuit. He also says it hasn’t received any complaints about posting fliers before the event, which he says was announced over the school’s intercom system.