Officials are taking drastic action after three people, including an 11-year-old and a 13-year-old, were attacked by sharks at a popular vacation destination.

An ABC analysis of the national Shark-Incident Database shows that the average number of verified shark bite incidents recorded annually over a decade has increased every 10 years since the 1950s.

The victim has been identified as 56-year-old Arlene Lillis, of Detroit Lakes.

Nico Antic was swimming with friends at a popular jump rock in Vaucluse when he was bitten by what’s believed to have been a large bull shark.

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