At least four people were killed and 20 injured, four of them critically, after a mass shooting at high school reunion at a South Carolina bar early Sunday, according to authorities.

All four victims were found dead at the scene after at least one shooter opened fire on the crowd of hundreds during the shocking attack at Willie’s Bar and Grill on St. Helena Island just before 1 a.m., the Beaufort County Sheriff’s Office said.

At least four people were killed and many more injured in a shooting at a St. Helena Island, South Carolina bar early Sunday morning. Google Maps

“Upon arriving at the scene deputies made contact with a large crowd of people, several of which were suffering from gunshot wounds,” the statement read.

“It was learned that hundreds of people were at the location when the shooting occurred. Multiple victims and witnesses ran to the nearby businesses and properties seeking shelter from the gunshots,” the statement continued.

The bar was hosting a tailgate event for an “alumni event” of nearby Battery Creek High School when the shooting broke out, owner Willie Turral told The Post and Courier.

All 4 victims were found dead at the scene in Willie’s Bar and Grill . Facebook/Willies Breakfast Bar and Grill

No arrests have been made, but authorities say they are “investigating persons of interest.”

The victims were rushed to the hospital by Beaufort County EMS on Sunday morning.

Their names have not yet been released, and the exact circumstances behind the shooting are not known at this time, the sheriff’s office said.

“This is a tragic and difficult incident for everyone. We ask for your patience as we continue to investigate this incident. Our thoughts are with all of the victims and their loved ones,” the statement concluded.

Willie’s cook Henry Wright, who was at the bar during the shooting, described the scene as “crazy” and told The Island Packet that he heard “a lot of shots.”

Wright said the patrons fled through the establishment’s back door in a panic after the shots rang out. 

Willie Turral, owner of Willie’s Bar and Grill, after the tragic incident. WJCL

One of the victims was found dead on the front steps of the bar, while three others were found outside, two on the ground near the front of the restaurant, and another by a tree on the property.

He said one of the victims was a “little girl” — who appeared to be a teenager.

Robert Adams, director of a nearby history and culture nonprofit, which is located just up the street from Willie’s, told the local outlet he heard gunfire “like a machine gun” and that large events at the watering hole have attracted “a lot of problems” in the past.

Politicians in South Carolina have spoken out in horror following news of the shooting.

“COMPLETELY HEARTBROKEN to learn about the devastating shooting in Beaufort County. Our prayers are with the victims, their families, and everyone impacted by this horrific act of violence. If you have any information, please contact the Beaufort County Sheriff’s Office at 843-255-3418, as soon as humanly possible,” Rep. Nancy Mace wrote on social media.

“The tragic news out of Beaufort County is heartbreaking. I’m lifting up in prayer the families who lost loved ones and those who were injured,” South Carolina Sen. Tim Scott wrote on X.

“All of us in South Carolina will be holding those affected close in our hearts in the days ahead,” he added.

The bar was the site of another shooting less than three years ago, when it was called the Island Grill. Two people were wounded in the November, 2022 incident after gunshots rang out in the parking lot around closing time, according to the Island Packet.