Police report a juvenile was arrested for filing a false report. According to officials, a social media rumor had indicated a threat at the school.
According to the school, all students in the middle school as well as at Windham Early Childhood Center were safe within the building.
The district will meet with police on Wednesday.
School officials said there was no early dismissal on Tuesday, but the middle school and childhood center will be closed on Wednesday. All other district schools will be open as normals.
The middle school had previously learned on a threat on Friday posted to Instagram.
Anyone with information on the first threat is asked to contact Willimantic police at 860-465-3135.