A Binghamton teen is accused of posting a threat against his former high school on social media.

18 year old Liam Sullivan is charged with felony making a terroristic threat for allegedly putting on Snapchat a warning that students should not go to school in Johnson City February 29 that included an image of a gun.

The treat was posted on line on the evening of Feburary 28 and high school officials were notified.

Prosecutors say a similar threat was reportedly made by Sullivan to a Johnson City school student a few weeks earlier.

He was originally charged with aggravated harassment.

Authorities say they didn’t find any weapons in a search of the teen’s Lydia Street home.

Sullivan was in Broome County Court March 8 for a bail hearing and released, wearing an electronic monitoring device.