According to police reports, a large crowd of high-school students celebrating a Senior Skip Day, an unofficial day off, gathered on the beach in Isle of Palms, and there were several altercations before the shots were fired at around 5:20 p.m. (21:20 GMT) on Friday.
"During one of those altercations, there were several shots that were fired. At this point, we have about six individuals that we know were shot," a police spokesman said in a video posted on local police department's social media, specifying that most of the people that were injured are "probably in their teens" and "around the age of 18."
The injured have been hospitalized, the spokesman said.