Investigations into former transport permanent secretary Supoj Saplom will not be derailed by his resignation from the civil service, the National Anti-Corruption Commission said yesterday.

NACC deputy secretary-general Worawit Sukboon said the three separate inquiries into unusual wealth, corruption and false asset declaration allegations against Mr Supoj will not be disrupted.

Mr Supoj's resignation took effect last Friday. It came ahead of today's NACC meeting to decide whether to seek an indictment against him for alleged unusual wealth.

"The resignation has no impact on the NACC's authority to look at the allegations," Mr Worawit said.

Mr Supoj was transferred to the Prime Minister's Office after the allegations began to surface following a break-in at his house in Bangkok last November.

He reported at the time that 5 million baht was stolen.

However, police later seized 18 million baht from the suspected robbers who then said there was a lot more cash in the house.

Mr Worawit said the inquiries into Mr Supoj for alleged corruption and false assets declaration offences are expected to be concluded in August and later this year respectively.

If the NACC decides to indict and Mr Supoj is found guilty of obtaining ill-gotten wealth, his assets will probably be seized. Mr Supoj has rejected speculation that he stepped down to try and avoid further investigation.