A 58-year-old swimmer suffered injuries to her right leg off Maui on Monday from a bite believed to be from a tiger shark.

The attack occurred at about 10:30 a.m. about 40 yards off Kamaole Beach Park in Wailea, according to the state Department of Land and Natural Resources.

Lifeguards used a bullhorn and watercraft to clear other swimmers from the water.

The woman was reportedly floating on the surface and hanging onto a foam flotation device when she was bitten on her right calf and right thigh, fire officials said.

Kihei resident Jordan Snow said he was near the shoreline when he saw the swimmer, named Barbara, by herself in water near the buoy. “Suddenly, I heard Barbara was saying, ‘Everybody out of the water! There’s a shark!’”

After she swam to shore, Snow saw her bleeding heavily from injuries to her upper right leg.

“She was bleeding really badly when she got out of the water,” he said. Lifeguards used a tourniquet to control the bleeding before paramedics transported her to Maui Memorial Medical Center.

She was listed in stable condition, according to a hospital spokeswoman.

Snow, a volunteer of Maui Mermaids, a swim group comprising older women who frequent the beach, said the victim swims at Kamaole Beach every morning.

Ocean conditions were reported to be quite good, with water visibility clear and 1- to 2-foot surf.

Shark warning signs were posted from Kalama Park to the Kihei Boat Ramp, and the beaches and ocean along there were closed.

Maui County lifeguards, along with state conservation officers, will be patrolling the waters this morning. If no additional shark activity is spotted, the beaches will reopen at noon, fire officials said.

A suspected shark attack occurred in October in waters farther north.

On the morning of Oct. 14, a 66-year-old Washington woman who lives in Kihei part time suffered injuries to her left leg while snorkeling between Charlie Young Beach and Cove Park, according to the Maui Fire Department. There were no witnesses, but the department said her injuries were consistent with those of a shark bite.

Bystanders heard the woman yelling for help about 20 to 30 yards offshore. A stand-up paddleboarder reached her, pulled her onto the board and paddled to shore.

The Fire Department said three beachgoers — two nurses and a firefighter who were on vacation — treated the woman for her injuries before lifeguards and firefighters arrived. She was transported to Maui Memorial in serious condition.