New Delhi: The CBI on Thursday arrested one of the alleged kingpins in the NEET-UG paper leak case who was absconding since the crackdown on irregularities in the entrance examination began, officials said.

Rockey alias Rakesh Ranjan, who hails from Nalanda and is said to be a relative of mastermind Sanjeev Mukhia, was nabbed by the agency on the outskirts of Patna, they said.

The CBI had been following him ever since the case came to the agency. His career came to an end Thursday morning when he was arrested by the agency, they said.

The agency produced him before a special court in Patna which remanded him for 10 days in CBI custody, they said.

The CBI conducted searches at three places in Patna and nearby areas and one in Kolkata after his arrest, they said.

Earlier this week, the CBI had conducted searches at 15 places in Bihar and Jharkhand gathering incriminating evidence in the case, they said.

The agency had earlier in the case arrested the principal and vice-principal of Hazaribagh-based Oasis School in Jharkhand and two persons who allegedly lent premises to NEET candidates where the burnt question papers were recovered by the Bihar Police.

The CBI, which is probing the alleged irregularities in the medical entry examination, has so far registered six FIRs in the matter.

The Bihar FIR relates to document leaks, while the remaining ones, from Gujarat, Rajasthan and Maharashtra, are linked to candidate impersonation and cheating.

The agency's own FIR, based on a reference from the Union Education Ministry, refers to a "thorough investigation" into the alleged irregularities in the examination.

NEET-UG is conducted by the National Testing Agency for admissions to MBBS, BDS, AYUSH and other related courses in government and private institutions.

This year, the exam was held on May 5 at 4,750 centers in 571 cities, 14 of them abroad. More than 23 lakh candidates appeared for the test.