Prosecutor Carina Coetzee said the four minors were placed under house arrest, according to the South African Press Association.

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The National Sea Rescue Institute (NSRI) saved those caught up in rip currents shortly after midday on Sunday, the South African Press Association (Sapa) said.

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On Friday afternoon, the South African Press Association said it had received an e-mail warning that the group was planning more violence, according to the Associated Press.

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