News 12 Long Island has learned another 15-year-old has been arrested for allegedly making a threat against Riverhead High School.   

The alleged threat was posted on Instagram.  

Police say the unidentified teen then wrote in a post that he was going to “send shots flying at the school.”  

The teen also mentioned that he wanted to do it for the first student who was arrested at the school two days ago for making similar threats.  

Police say no weapons were found on the teen or at a search of his home.