Updated at 5:43 p.m.Two days after 17 people were killed at a high school in Florida, five Onslow County schools were under lockdown following a threat on social media.Authorities say the message was created in South Carolina on Wednesday.A freshman at a Spartanburg high school was arrested Thursday after a Snapchat post warned of “round two of Florida,” said Lt. Kevin Bobo, a public information officer with the Spartanburg (SC) [...]
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