A shark sighting Saturday afternoon temporarily closed a Cape Cod beach to swimming.
Head of the Meadow Beach in Truro is closed to swimmers until 5 p.m. after a shark was spotted nearby its shoreline.
Earlier in the day, Nauset Beach was closed to swimming after a confirmed attack on a seal by a great white shark at 9:50 a.m., according to the Atlantic White Shark Conservancy's sharktivity app.
The water re-opened to swimming after one hour.
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A number of shark sightings have closed the beach in Orleans multiple times this summer, most recently Friday morning when a great white was spotted about 60 yards from the shore.
Surveillance has been stepped up this summer after two shark attacks on humans off Cape Cod last year, including one that killed a 26-year-old Massachusetts man.