This is the first time that Sivasankar is being questioned in the case.
The charge sheet says he passed over intelligence secrets to Swapna Suresh.
Swapna had filed the affidavit in response to the state government’s plea to close the conspiracy case related to gold smuggling.
Lok Sabha MPs N K Premachandran and Adoor Prakash had asked the Central Government to explain its stand on this case.
Swapna Suresh and P S Sarith had told Customs that Sivasankar had sought their assistance to send an important bag left behind in Kerala when Pinarayi travelled to Dubai.
Gold smuggling case accused Swapna Suresh had claimed that M Sivasankar, co-accused in the case, had introduced Shaj Kiran to her by saying that he was associated with the Believers Church.
According to Swapna, ADGPs Ajith Kumar and Vijay Sakhare talked with Shaj 56 times while he was with her.
Talking to media on Thursday, Shaj said he never threatened Swapna nor asked her to withdraw her statement and create a video of her apologising for her statement.
In a statement that can have far-reaching impact in Kerala, Swapna Suresh said Chief Minister Pinarayi Vijayan was involved in the scam.
Earlier, Swapna Suresh had said a bag of currency notes belonging to the CM was flown to Dubai at the instructions of M Sivasankar.