Three flights was evacuated Friday evening after an airport spokeswoman said there was an unidentified threat.
According to the spokesperson, a local law enforcement agency received a bomb-threat against an aircraft at the Charleston International Airport. The airport authorities then pulled passengers off Delta and United Express airplanes.
Authorities say about 263 passengers in concourse A were re-screened and had their bags rechecked as a safety precaution. The spokeswoman says all three flights were delayed for a couple of hours.
The South Carolina Law Enforcement Division, Transportation Security Administration, Customs and Border Protection and Charleston County Bomb Squad were all called out to help in the investigation.
A K-9 Unit was also called in to sniff the tarmac.