BOSTON -Police in Danvers, Massachusetts, began an investigation late on Tuesday, Oct. 23, after receiving calls that a student at the school had not returned home, and that a teacher had also not gone home and was not responding to her cell phone, Essex County District Attorney Jonathan Blodgett told reporters on Wednesday.

After a brief investigation, Police found the body of Colleen Ritzer, 24, a math teacher at Danvers High School, in the woods after discovering blood in a second-floor bathroom.

A 14-year-old student was found walking along a highway about 12:30 a.m., and has been arrested under suspicion. 

All public schools in Danvers, about 20 miles north of Boston, were closed on Wednesday, although police believed there was no continuing threat to public safety.

Authorities declined to comment on how Ritzer was killed or if there might have been any type of relationship with the student.