Overview

• USC ordered a campus lockdown after a 6:30 p.m. alert on Sunday, then issued an all clear after 8 p.m. as police finished searches and kept the library closed pending checks, with reopening planned for Monday morning.
• Law enforcement reported no evidence of gunfire or a firearm, and a deputy police chief said there was no video showing anyone with a gun.
• Images and video shared online that some believed showed a rifle were later identified as a student carrying an umbrella.
• Emergency medical crews treated a small number of minor injuries that occurred during evacuations.
• Representative Nancy Mace shared and then deleted a photo labeling an “alleged shooter,” drawing criticism after officials said the person pictured held an umbrella, in a week that also saw false shooter reports at Villanova and the University of Tennessee at Chattanooga