Police say they have arrested seven people for allegedly stealing classified government documents and selling them to energy companies.

Police Commissioner Bhim Sain Bassi said three men were arrested after they were caught trespassing and stealing documents from India's ministry of petroleum and natural gas.

The men were caught Tuesday after authorities acted on a tip that some individuals were stealing and leaking documents from the ministry. They have been charged with trespassing, forgery and theft.

Four other men, including two energy consultants, were arrested later, Bassi told reporters on Friday.

The men would steal documents and photocopy them and sell these to independent consultants and energy companies, Bassi said.

Police said executives from several oil companies in India were being interrogated and more arrests were likely.