Initial reports suggest that seven had been shot, with that number expected to grow, according to CBS.
A live camera feed of the boardwalk showed dozens of terrified beachgoers running from the scene.
Other unverified footage on social media appeared to show a number of bloodied people being treated for wounds at the scene.
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Police have closed at least one road into the area.
It’s not known at this stage if there had been any fatalities.