PONCHATOULA — Ponchatoula High School and Martha Vinyard Elementary School were put on lockdown Tuesday morning after Tangipahoa Parish Sheriff's deputies were alerted to a potential shooter.Deputies responded to an anonymous tip that claimed someone was on their way to the high school with a gun around 11:30 a.m. The school went on immediate lockdown and deputies from across the parish responded. They have been on the campus since. Out of precaution, Martha Vinyard Elementary School is... Read this story