Authorities say a man has been bitten multiple times by a shark on North Carolina’s Outer Banks, the fifth such attack in the past two weeks.

Multiple media outlets reported that a 47-year-old man was bitten on the back on Friday while he was in the surf off Avon on Hatteras Island.

WVEC-TV in Norfolk, Virginia, reported the man was being transported to a hospital there.

Several children have been the victims of shark attacks along North Carolina’s coast this month including a 13-year-old girl and 16-year-old boy who both lost limbs about 90 minutes apart at Oak Island. An eight-year-old boy suffered minor injuries when he was bitten on Wednesday.

Red flags were raised at Avon alerting beachgoers of a shark attack.

Officials at the National Park Service, which oversees the Cape Hatteras National Seashore, were not immediately available for comment on Friday.