Horrifying moment two swimmers were bitten by shark and two others injured during Fourth of July celebrations (photos/videos)

Shark attacks disrupted Fourth of July celebrations on Thursday at South Padre Island.

Two people were taken to the hospital with bites, at least one of them severe, authorities said. Two more were injured after they encountered the shark.

Police were called for the attack on the man who was severely bitten around 11 a.m., according to Nikki Soto, the South Padre Island city secretary. He was initially treated at the beach by firefighters and police.

The Texas Parks & Wildlife Department said later in a statement that two people were bitten and two more “encountered” the shark but were not seriously hurt. One of the bite victims was taken to a hospital in Brownsville, and the other was “flown out for further treatment.”

Based on witness reports and images on social media, Game Warden Capt. Chris Dowdy said authorities believe a single shark about 6 feet (about 1.8 meters) long was responsible for all four attacks. People are being kept out of the waters at South Padre Island.

Videos shared online show a woman being pulled out of the water,  blood trailing her. A huge chunk of her calf had been bitten off by the shark.

Beach patrol, firefighters and police were patrolling the shore and flying drones after the attacks, Soto said.

The Texas Parks & Wildlife is assisting with the investigation.

Watch videos from the scene below.

Mean while in South Padre Island a tragic Fourth of July for some 💔 pic.twitter.com/onx10cvwZ0

— J LpZ (@janelpz30) July 4, 2024