The investigation comes after the renowned British engine-maker agreed to pay a $808 million fine to authorities in Britain, the United States and Brazil to settle bribery and corruption claims.
After its largest ever graft probe, Britain's Serious Fraud Office found Rolls Royce paid massive bribes over three decades to win contracts in Indonesia, Thailand, India, Russia, Nigeria, China and Malaysia.
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But the findings -- concerning the engine maker Rolls-Royce, which has no connection with Rolls-Royce cars, a marque owned by the Germany auto maker BMW -- will likely make for uncomfortable reading in the countries where bribes were paid.
In Thailand investigators found some $36 million in bribes and incentives were paid between 1991 and 2005 to intermediaries -- including "agents of the State of Thailand and employees of Thai Airways" -- to help the company win lucrative jet engine deals.
A Thai Airways statement said the company will "gather information from all the sources in order to investigate the matter thoroughly".
"When all facts have been compiled and reviewed" the airline will determine appropriate actions to take on any corruption found", the statement added.
Sansern Poljiak, secretary general of Thailand's anti-corruption watchdog the National Anti-Corruption Commission told AFP that his staff were "seeking more information" from UK and US authorities before deciding whether to launch their own probe.
He warned that some of the allegations unveiled by British investigators may have occurred too long ago to bring criminal charges, although civil compensation claims could still be made.
The public data released by the British courts does not name implicated individuals.
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