The five persons, including two junior employees of oil ministry, were taken to the rooms of senior officials which they had allegedly accessed using duplicate keys.
The rooms that they had allegedly accessed in the middle of the night to steal official documents included rooms of joint secretary (Refineries) and joint secretary (Exploration), besides rooms of some directors.
Cracking down on a suspected case of corporate espionage, police had yesterday arrested two Oil Ministry officials and three (rpt) three middlemen for allegedly leaking classified government documents to energy companies for money.