Students were allowed back into St. James High School around 12:30 p.m. Tuesday, after being evacuated to the football field because of a written bomb threat, according to Horry County police.
A note was found in the same bathroom where another bomb threat was found on December 2, said Horry County School District Spokeswoman Teal Britton.
The Horry County Police Department's Bomb Squad conducted a sweep of the school.
In the past three weeks, police have responded to five bomb threats at the school. Each one has turned out to be false. Officers end up not being able to spend a much time on their daily cases, like narcotics investigations, when such a high number of bomb threats are called.
"Each time, our bomb squad has been called out. Most of the time, it is during the regular school day while these guys are doing their primary job as well, but we have had evening calls too where the bomb squad has had to come out and sweep the school," Horry County Police Sgt. Robert Kegler said.
Police say when they find the person or people making the threats, they will face serious charges.
"This isn't going to be a misdemeanor 'disturbing schools' type charge. A bomb threat holds up to a ten-year prison sentence. It's definitely a serious matter whenever anything like this gets called in," Kegler added.
Police plan to look through school surveillance video to see if they can figure out who is posting the threats.
Anyone with information is encouraged to call police. People who'd like to remain anonymous are encouraged to use Horry County School's tip line at 843-915-SROS (7767),
"If they don't want to talk to the police one-on-one, the school tip line, as well the school email, is a definite tool for them or a definite avenue for them to speak to law enforcement in order for them to give us the information we need to put a stop to this," Kegler said.