According to police, the three were involved in extracting money from people in the pretext of lotteries or receiving parcels.
They were also part of a larger scam of hacking financial institutions and transacting such funds through various bank accounts. They would then channel the money to India via various means after retaining a commission of 15 to 20 per cent for themselves, police added.
Nigerian national Peter Herman Assenga, British national Smith Morris, and ten Indian nationals are known to have masterminded the fraud and hacking schemes, wherein they led their Nepali agents to carry out the illegal transactions on their behalf.
Investigations show that a total of Rs 146,791,000 has been illegally transacted, police said.
So far, 34 Nepali citizens have been found involved in the scam while 15 victims of the fraud are in contact with police.
Police have initiated an investigation into the matter to check whether banks used by the perpetrators have been hacked, police said.