Uttar Pradesh Police arrested one person in connection with the leak of the All India Engineering Entrance Examination (AIEEE) question papers that affected more than 1.2 million students across the country.
Phool Chand, a resident of Jaunpur, was arrested from Lucknow, around 215 km away, late on Monday, the police said on Tuesday.
The police have also launched a manhunt to nab Deen Dayal, the alleged gang leader and mastermind behind the leak.
"The special task force (STF) conducted raids at several places to nab Dayal. The forces have unearthed that Dayal owned huge properties in Ghaziabad, Noida and Delhi," special director general of police Brij Lal told media persons here.
The police said the gang, which had been in the business of illegally leaking exam papers for a while, has also been operating in Bihar, Madhya Pradesh and Gujarat.
"The STF will soon be able to track down the main accused, Dayal," Lal said.
On Saturday night, the STF learnt that the AIEEE question papers had been leaked and were available in the market in Lucknow and Kanpur. The question paper was being sold at Rs 6 lakh per copy, the police said.
A case was later registered at the Hazratganj police station.
The AIEEE, which is held in two parts for admission into National Institutes of Technology and other engineering colleges, was postponed by two hours on Sunday.
The exams for the first paper slated for 9.30am began at noon and the second paper to start at 2pm was conducted at 4pm.
Meanwhile, CBSE, which conducts the AIEEE exams, has decided to set up a three-member enquiry committee to investigate the incident. The committee will submit its report within four weeks.