TRURO (CBS) – Long Nook Beach in Truro will remain closed to swimming until further notice after a 61-year-old man was bitten by a shark Wednesday, while a second was temporarily shut down Thursday after another sighting.

The attack happened Wednesday around 4 p.m.

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The swimmer, identified as William Lytton of New York, was standing in the water about 30 yards offshore when the shark bit him. Lytton suffered puncture wounds to his hip and torso.

On Thursday, a shark sighting was reported around 11:30 a.m. at Head of the Meadow Beach. The beach was shut down for about an hour so the sighting could be investigated.

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A surfer is carried off Long Nook Beach after he was attacked by a shark (WBZ-TV)

Following the Long Nook Beach attack, beachgoers teamed up to help carry Lytton up a nearby dune and into a parking lot. He was then flown by MedFlight helicopter to Tufts Medical Center where he remains in serious condition.

Truro officials announced a short time after the attack that Long Nook Beach would remain closed until further notice. There has been no update on when it will reopen. Though swimming is prohibited, the beach itself is open.

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The town said if no sightings are reported on Friday, the beach could reopen by Saturday.