Those arrested include owner of Ashwin Gold Sanjay Nikam (30), Jaykumar and Saji, who do import and export consultancy, and Jeeson, an accountant with a jewellery shop where the gold was sold.
The four had been arrested under sect 104 of Customs Act, 1962, Customs Commissioner Dr K N Rghavan told reporters here.
The gold, totally weighing 21.95 kg, was sold to three jewellers -- Kallarakkal Jewellery, Angamally; Southern Jewellery and Smijo Jewellery, both Thrissur, and the owners of the jewelleries have also been summoned for questioning, he said.
On verification, it was found that gold weighing 10.5 kg imported by Ashwin Gold on Aug 8, had been removed clandestinely after it arrived in CSEZ.
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Further investigations revealed that the said gold had been removed to the premises of two jewellers at Thrissur- 6.5 kg to one jeweller and four kg to another.
Investigations also revealed that the unit in CSEZ had removed 10 kg of gold received earlier clandestinely to premises of another jeweller at Angamally.
Gold is permitted to be imported into CSEZ on condition of export of jewellery/ ornaments with value addition.
The conversion of gold bar to jewellery was to be done within CSEZ itself and any movement to the domestic market can be done only with permission of CSEZ officials.
In this case, the onwer of the unit had concealed the gold imported duty free inside his car and smuggled it outside, Raghavan said.