(Fort Worth, TX)  — A former student of a Fort Worth high school is under arrest after police say he posted a threat against the school on social media.

A Snapchat video that threatened a shooting at South Hills High School came to the attention of the police on Wednesday.  Investigators identified 18-year-old Daniel Gomez, a former South Hills student, as the suspect, and police rounded him up.

Two other Fort Worth schools were put on lockdown on Wednesday to be on the safe side.