Extra security is in place at Sachem North High School after a social media post involving a gun.

Police say they were told Saturday that a male student from Sachem had posted the picture of the gun.

A call went out to parents from the superintendent that said, "The incident that allegedly took place was not one that involved Sachem North yet the Suffolk County Police Department is involved. They do not believe the pictures to be credible."

The post has since been deleted, and the incident is under investigation.