Someone spray-painted graffiti inside Community High School in Ann Arbor this week, police said.
Police were called to the school at 8:30 a.m. Friday morning to investigate the complaint, Lt. Renee Bush said.
Officers found graffiti in three locations inside the school: black paint on a window that read KETO, illegible black paint on a red door and the letter Q with other unreadable letters inside a boy's locker room, Bush said
Some of the graffiti was noticed earlier in the week but not reported to the police by school authorities until Friday morning.
The school is located at 401 N. Division St. in Ann Arbor. Detectives continue to investigate, Bush said.
John Counts covers cops and courts for AnnArbor.com. He can be reached at johncounts@annarbor.com or you can follow him on Twitter.