By John Geddie
SINGAPORE (Reuters) - A Singapore court on Saturday charged three men suspected of involvement in large-scale oil theft at Shell's biggest refinery, days after bringing charges against 11 under an extensive probe by authorities in the city state.
Police have seized millions of dollars in cash and a small tanker in the sting operation involving simultaneous raids across Singapore, one of the world's most important oil trading centres and a major refinery hub.
But the charges levelled against three additional suspects on Saturday have entangled Sentek Marine & Trading Pte, one of Singapore's biggest marine fuel suppliers, and the investigation found that one of two vessels used to transport the stolen oil products was managed by the firm.
The role of the third, a Vietnamese national, was not immediately disclosed by the court or the companies.
A Shell spokeswoman said none of the men charged on Saturday was an employee of the company.
The amount of oil products involved in the theft on two days in late 2017 were in addition to more than 4,300 tonnes of gasoil valued at S$2.4 million specified in charges brought against other 11 suspects on Tuesday.
Sentek 26, which carries a Singapore flag, and MT Gaea have been travelling around the city state over the last 30 days, both making one journey down to the Indonesian island of Batam in late December, Thomson Reuters data shows.
The manager of the ship Sentek 26, Sentek Marine & Trading, was the biggest bunker fuel supplier in Singapore by volume last year, according to official data. Singapore is the world's biggest marine refuelling stop.
($1 = 1.3251 Singapore dollars)
(Reporting by John Geddie, additional reporting by Roslan Khasawneh and Florence Tan; Writing by Jack Kim; Editing by Simon Cameron-Moore)
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