A 13-year-old student was arrested for posting social media threats against the Springs School in East Hampton
Officials say the threat involved a doctored photo of another student who was not involved in the incident.
The teen has been charged with making a terroristic threat, which is a felony.
The superintendent says the school was not in any immediate danger.
This is the third threat against a Long Island school this week.
Police also investigated threats against schools in Long Beach and Valley Stream.
Those threats were also deemed unfounded,