Delhi Police on Thursday arrested 2 more persons in connection with the corporate espionage case.

"Jitender Nagpal, PS to Joint Secretary in Forest and Environment ministry and Vipan Kumar, PA to a UPSC member were arrested," Joint Commissioner of Police (Crime), Ravindra Yadav said.

"Vipan was earlier posted at Ministry of Petroleum and Natural Gas and he was getting secret documents with the help of his contacts mainly from there," he added.

The two have been arrested in the connection with the second FIR in which 5 people were named earlier including Lokesh, an energy consultant who was arrested on Monday by the Crime Branch busting the second module in the corporate espionage case.

"Nagpal and Vipan used to provide stolen documents to Lokesh," Yadav said.

Cracking down on a suspected case of corporate espionage, Delhi Police had on last Thursday arrested two junior Oil Ministry officials and three other middlemen for allegedly leaking classified government documents to energy companies.

On Friday, two energy consultants Santanu Saikia and Prayas Jain and five senior executives from top energy firms identified as Shailesh Saxena from RIL, Vinay Kumar from Essar, KK Naik from Cairns, Subhash Chandra from Jubilant Energy and Rishi Anand from ADAG Reliance were arrested.

A total of 16 people have been arrested in connection with the two FIRs by the Crime Branch so far.