LUCKNOW, Oct. 22 -- The National Investigation Agency (NIA) has arrested two alleged main conspirators accused of printing and supplying counterfeit Indian currency notes that investigators believe were channelled through multiple accused into the Punjab National Bank's (PNB) currency chest in Saharanpur, bringing the total number of arrests in the case to seven, officials said on Thursday.

The NIA arrested Ajay Kumar, son of Ramesh Chand, from Ambala in Haryana on October 16, and Harish Rounta, son of Devi Chand Rounta, from Manali in Himachal Pradesh on Thursday, according to a statement issued by the agency.

The NIA identified the two as main conspirators in the production and supply of a large quantity of fake Indian currency notes....