Sansern Poljieak, secretary-general of the National Anti-Corruption Commission (NACC), said on Thursday that its nine commissioners have set up a subcommittee to probe individuals involved in the purchase of seven Rolls-Royce engines for Thai Airways International aircraft between 2004 and 2005.

A total of 26 people were found to be involved with the purchase, including Suriya, Vichet, 15 board members of Thai Airways at the time, and nine members of the national airline’s long-term investment subcommittee, according to Sansern.

Both Suriya and Vichet had served under a government led by Thaksin Shinawatra.

The NACC had found that Rolls-Royce was unfairly favoured in the bidding for THAI’s aircraft engines between 2004 and 2005.

The interrogation will be conducted by all nine commissioners of the NACC, as well as advisers from relevant agencies, including the Anti-Money Laundering Office, the Office of the Attorney General and the Royal Thai Police.