Two CBI teams from Delhi reached Bihar and Gujarat on Monday to probe the alleged paper leak in the NEET-UG conducted on May 5, a day after registering a fresh FIR in the case.

An agency team reached the office of the economic offences unit (EOU) of Bihar police in Patna which has so far arrested 18 people in connection with the case.

Gujarat police have arrested five persons, including the principal and teacher of a school in Godhra, in the same case.

“Our teams are collecting evidence related to the case from police agencies in Bihar and Gujarat that are probing the case in their respective states. The agency is likely to take custody of the arrested accused persons in the two states,” a CBI official said in Delhi.

Sources said the evidence collected by the EOU during the investigation includes pieces of the burnt question paper recovered from a house in Patna, mobile phones of those arrested, SIM cards, laptops, post-dated cheques and reference question papers provided by the National Testing Agency (NTA).

“All those arrested are in judicial custody in Patna and the CBI team may take them to Delhi for detailed interrogation by obtaining transit remand from a court here,” the CBI official said.

“A disproportionate assets case may be registered against arrested accused Sikander Prasad Yadvendu, a junior engineer in the Danapur Town Council, as he reportedly acquired huge assets that are disproportionate to his known source of income,” the official said.

Yadvendu, originally from Samastipur, is said to be the prime suspect in the case.