Fifteen teams of the NIA were assisted by the state police forces during the raids it conducted at the residences and offices of managers of different companies in Ranchi, Hazaribagh and Jamshedpur in Jharkhand, and Durgapur in West Bengal.

The companies are associated with purchase and transport of coal in Amrapali and Magadh coalfields in Jharkhand and allegedly involved in providing funds to TPC, an NIA statement said.

The anti-terror agency has also seized huge incriminating materials and documents pertaining to payments made to Amrapali and Magadh area committees, bank account details and fixed deposits, deduction of levy amount, computers, hard discs, mobiles containing accounts of companies, and diaries containing entries of money paid to TPC and Peoples Liberation Front of India during the raids.

The NIA has also seized cash equivalent to Rs 68 lakh, besides 10,000 Singapore dollar and 1,300 USD, besides Rs 86,000 demonetized currency.

The NIA took over the case from Jharkhand Police and registered an FIR on February 16 this year following Home Ministry's order. The Jharkhand Police had registered an FIR in the case in January 11, 2016.