43-year-old Kale Jagdish Purushottam forged signatures to siphon off USD 10 million from his present clients and made more unauthorised transactions to recover and replace the sum.
As of now, it is learnt the trio is co-operating with the investigation and the interrogation will continue in the coming days.
With due intervals and presence of an advocate as ordered by the Ernakulam Principal Sessions Court on Tuesday, the police questioned the priests from 10 am to 4 pm.
The forged documents case, which rocked the Syro-Malabar Church, saw an intriguing twist on Sunday with the arrest of 24-year-old techie Adithya Valavi.
However, it snowballed into a controversy after it was found to be fake.
A police case was registered in February following a complaint filed by Fr Joby Maprakavil against apostolic administrator of the Archdiocese of Ernakulam Angamaly.
The three accused, including the two officials of SBI and another person, were sentenced to jail for three years in 2015.
Fake documents seized from them included a UN Security Council identity card which showed her designation as Nuclear Policy Officer based at Washington DC.
He said that whatever came out in the magazine (Caravan) which broke the story was not part of the Income Tax department's seized material.
The crime had come to light in 2004, months after the theft of Rabindranath Tagore's Nobel medal.
The accused, Sanjay Kumar, a native of Belagavi, was desperate to get a government job and allegedly downloaded the PM’s signature to use it on the letter that he sent to the registrar.
Instead of Rs 12,830, the lawyer had obtained a bank demand draft for just Rs 30, and later forged it by adding numbers ‘128’ before the ‘30’.
Sheena Bora murder case: Didn't know forging signature is wrong, says Indrani Mukerjea's ex-secretary
According to the CBI, after her daughter Sheena's death in April 2012, Indrani asked Kajal Sharma to practice her signature and use it on a resignation letter sent in Sheena's name to her employer.