ASI Anil Kumar and Madhava Kurup, a retired Class-III employee of ISRO, and two others were arrested from Thiruvananthapuram yesterday, police said.
They were produced before the Judicial Magistrate Court here today, which remanded them in judicial custody.
Police raided an apartment in Thiruvananthapuram, and seized fake notes with a face value of Rs 2.85 lakh in Rs 500 denomination.
The gang had allegedly circulated fake currencies in Thiruvananthapuram. Police is on the lookout for other persons who acted as their links in some of the neighbouring states.