Two juveniles have been detained by Willoughby police after making threats against a school on social media.
Police said the threat was made against Willoughby South High School on Monday night.
The department received multiple calls from concerned parents and students about the threat.
Police informed the FBI who joined the investigation.
Willoughby police said the threat is still under investigation and additional officers will be present at the school.
Eastlake police will also have an extra presence in Eastlake schools as a precaution to ensure the safety of the students.