The South Carolina Law Enforcement Division sent out a warning on Tuesday after dozens of school threat investigations so far this month. In a release, SLED officials said they are aware of more than 60 threats targeting schools throughout 23 South Carolina counties since September 4. SLED Director of Public Information Renée Wunderlich said 21 juveniles have been charged in connection to these school threats.”These threats are extremely serious and will be treated as such,” Wunderlich said. “Upon discovery of the threats, law enforcement officials worked diligently to secure schools and find those responsible. That work continues. Many of the threats appear to be shared between students through social media or other digital messaging apps.””School threats are not a joke,” SLED Chief Mark Keel said. “Law enforcement takes every threat seriously, and everyone needs to understand that there are serious consequences.”The warnings came just minutes after Spartanburg police announced the …