HIGHTSTOWN, N.J. (AP)  -- Police in a Mercer County town say they are investigating a report that a high school student lit afire the turban worn by a Sikh student.

A group representing Sikhs is calling for a full investigation and asking for Hightstown High School to do more to combat discrimination against followers of the religion.

The Sikh Coalition says the fire was lit on May 5 during a fire drill while the Sikh student -- one of only two in the school who wear a turban -- was talking with a friend. The student put out the fire and was not injured.

But the New York-based coalition says the school should hold an assembly, publish a newsletter article and require classroom discussions about the alleged incident.

No charges have been filed.