A hit list targeting African-American students is found scrawled on a bathroom wall of Port Huron Northern High School.
School officials have upped security on campus as they try to figure out which student wrote the list.
Letters were sent home to parents on Monday detailing the threat found in the bathroom stall last week.
The writing included a racial slur along with a hit list singling out 8 African-American students.
It marked Tuesday's date as when the threats would be carried out.
There were no problems of note on that particular school day.
The district and police have been working together to identify the person responsible.
Police are hoping interviews with students and review of video footage will lead to an arrest.