Uttar Pradesh Special Task Force SSP Amit Pathak said the crime came to light during the Railway Recruitment Board exam on April 22 in Allahabad.
The gang used to solve papers of online exams in connivance with the exam staff at various centres in Uttar Pradesh and used to charge hefty amounts from the aspirants.
Several computers, laptops, routers, fake voter id and Aadhaar cards, driving licences and passbooks of several bank accounts were seized from the accused.