Police in Prince William County, Virginia, are investigating racist graffiti found inside a restroom stall last week at a Woodbridge high school.

Swastikas, profanity and offensive images were found inside a boys restroom at Hylton High School on May 24, police said.

“The drawings did not appear to contain any threats and school personnel removed the images,” police said in a statement.

The graffiti is believed to have been drawn between 10 a.m. and noon that day.