Defence minister Manohar Parrikar on the Scorpene submarine leak: "We are going by assumption of the worst case scenario. Our submarine has so far not done sea trials therefore the most imp signature doesn't form part of the documents. We have told them (Indian Navy) based on inputs, to find out area of concerns and then take appropriate steps to address it. A few pockets of concern, assuming worst case scenario, but not a big worry. Well be able to put things into perspective."

More than 22,000 pages of top secret data on the capabilities of six highly advanced submarines being built for the Indian Navy in Mumbai in collaboration with a French company have been leaked, ringing alarm bells on Wednesday in the security establishment.

The combat capability of the Scorpene submarines being built at Mazagon dock at a cost of $3.5 billion (over Rs 23,495 core) by French shipbuilder DCNS, went public when an Australian newspaper, "The Australian", put the details on the website.

Reacting with alacrity to the development, Defence Minister Manohar Parrikar, who learnt about the leak at midnight, ordered Navy Chief Admiral Sunil Lamba to go into the 'entire issue". A detailed report is also being sought by the Indian government from DCNS.

"What I understand is there is a hacking. So we will find out all this," Parrikar told media persons in Delhi on Wednesday.

The details leaked included what frequencies the submarines gather intelligence at, what levels of noise they make at various speeds and their diving depths, range and endurance all sensitive information that is highly classified, the Australian said.