Kikei, Maui – Two shark encounters separated by about an hour closed a four-mile stretch of South Maui beaches Monday and left a woman hospitalized with bite wounds on her right foot and calf.

An initial report of a shark sighting around 7:30 a.m. off Kamaole Beach Park II triggered an alert to county lifeguards, who warned people to stay out of the water. A man surfing in the area told officials a friend’s surfboard was bumped by what appeared to be a tiger shark.

Then, at 8:34 a.m., a bystander reported that a woman in her 60s had been attacked by a shark while she was snorkeling off Keawakapu Beach, according to Maui County spokeswoman Mahina Martin.

The woman was taken to Maui Memorial Medical Center, where she underwent surgery. Hospital spokeswoman Carol Clark said the woman’s husband did not authorize the release of information about her condition or other details.

The shoreline from Kalama Park to the Grand Wailea Resort Hotel & Spa remained closed late Monday afternoon and probably would not reopen until midday today, Martin said. County lifeguards and personnel from the state Department of Land and Natural Resources were monitoring the areas.

DLNR conservation enforcement officer Nalu Yen scanned the Keawakapu Beach coastline Monday morning to ensure that people stayed out of the water.

On Sunday, there was also a report of a kayaker who “got bumped” by a shark off one of the Kamaole beaches, according to Skippy Hau, aquatic biologist with the state Division of Aquatic Resources.

Waters off Keawakapu Beach also were the site of a shark attack Dec. 21, 2005. San Diego visitor Jonathan Genant, 29, lost his left hand’s pinkie and a portion of his ring finger when a shark bit him as he swam offshore.