PORT ST. LUCIE, Fla. (CBS12) – The Port St. Lucie Police Department (PSLPD) says there is no danger to any of its schools after a threat was circulating on social media. The police department says the threat began circling on SnapChat. PSLPD says the threat was a three-part plan that involved pulling a fire alarm at an unarmed school that would then be followed by a shooting.