COON RAPIDS — A suburban Minneapolis school district is investigating after a Muslim student said a classmate pulled off her head scarf and threw it on the ground.

The Minnesota chapter of the Council on American-Islamic Relations says the incident allegedly happened Friday to a student at Northdale Middle School in Coon Rapids.

The student’s family reported to the advocacy group that another student came up behind the girl, removed her hijab and threw it on the ground, and then pulled her hair down in front of other students.

In a statement, the Anoka-Hennepin School District says preliminary findings indicate it was an isolated incident and not motivated by bias.

School officials say they immediately reached out to the students and families involved when they learned of the incident.