As part of their investigation into the criminal activities of Philip Baron, and his associates, dubbed Operation Beath by the Serious Organised Crime Agency (SOCA), police seized £800,000 in cash.
In one operation SOCA, working with West Yorkshire Police, seized £380,000 from a courier off the M62 near Leeds.
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Matalan said: "It is with great sadness we can confirm...both victims worked at our Cardiff branch."
The 21-year-old was using a portable toilet in Sydney when he was bitten near to the same area as in a previous incident in April.