The 1,000lb 1.5 metre explosive was discovered 'intact' by construction workers in Quarry Bay, a business district on the west side of Hong Kong Island.
Hussain Meer, 26, Mir Wayne Carew, 25, Yanne Sarkawt, 25, and Malique Kai Walters, 27 reportedly pointed a knife and gun at lawyer Ibrahim Iyun, before snatching his Audemars Piguet watch.
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