PORT HURON, MI - Officials at a Michigan high school say they've increased security after a list targeting black students was found written on a bathroom wall.
The list of seven to nine students was discovered at Port Huron Northern High School a week ago, Port Huron Schools Superintendent H. Ronald Wollen said Tuesday.
The note said something would happen Tuesday, Wollen said.
"They didn't really get specific," Wollen told the Detroit Free Press. "That's why we're going to have the police patrolling."
Parents received a letter Monday from Port Huron Northern Principal Chip Mossett informing them of the threat.
"Even though it is difficult to accurately assess the credibility of the threat, the Port Huron Area School District and the Port Huron Police Department take this type of threat very seriously," the letter said.
Although several students had been interviewed, investigators were having a "difficult time pinpointing the person who wrote the comments on the wall," Acting Police Capt. Jeff Baker told the Port Huron Times Herald.
Wollen said he believes one or two students in the 1,700-student school are responsible.
"When one or two students do something inappropriate, one can't generalize an entire school," he said. "It's really just a wonderful place."