California schools were on heightened alert Dec. 17 after school shooting threats were circulating nationwide on TikTok and other social media. It is unclear where the anonymous and vague school threat first originated from but the posts warn of shootings and bomb threats at schools around the country on Friday. Los Angeles Unified School District issued a statement on Thursday debunking the threats. “While there is no reason to believe our schools are in danger, please know we take all such threats very seriously,” according to a district statement. The U.S. Department of Homeland Security also said Friday it has no evidence of credible threats but urged the public to “remain alert.” South Lake Middle School in Irvine went on lockdown after police were informed of a student brandishing a gun, according to the Irvine Police Department. The school entered a partial lockdown while police uncovered a toy pellet gun, …