Manchester High School was placed into secure mode around 9:30 a.m. on Friday after administrators learned there was a rumor that a student brought a weapon to school.
The staff contacted the school resource officers, who secured the school and interviewed several students, according to superintendent Matt Geary.
The officers found the student in question and determined there was no weapon.
After a short period of time, the secure mode was lifted.
Any students who were frightened by the incident and need additional support can reach out to school administrators, according to Geary.