A mass shooting at a crowded bar in the southern US state of South Carolina has left four people dead and at least 20 injured, officials said. Hundreds of people were gathered at the popular bar on St Helena Island in the early hours of Sunday morning when gunfire broke out, leading multiple victims and witnesses to run to nearby businesses for shelter, according to the Beaufort County Sheriff's office. Four people were declared dead at the bar, and at least 20 were injured, including four who were sent to local hospitals in critical condition, the sheriff's office said. The incident is still under investigation, and the sheriff's office is looking into possible suspects. When police and first responders arrived, they found several people suffering from gunshot wounds. It's not clear if the shooting was random or targeted, and a spokesperson for the sheriff's office declined to share more details. The bar where the shooting took place, Willie's Bar and Grill, offers Gullah-inspired cuisine and aims to promote the heartwarming spirit of Gullah Geechee culture. Representative Nancy Mace expressed her heartbreak over the shooting on social media, offering prayers for the victims and their families.