The prosecution file states that the former kangaroo skinner and father of two who converted to Islam joined the terror group Lashkar-e-Toiba in Pakistan, travelled to the border with Indian Kashmir in 2000 and fired on Indian troops.
Reports of the American disclosures were sent to New Delhi this week by the Indian deputy high commissioner to Australia, Vinod Kumar.
Senior officials in New Delhi yesterday confirmed they were examining that material.
"We're looking into it and finding out the facts," an official in New Delhi told The Weekend Australian.
"If Mr Hicks was involved with them at any level, and if he was indeed firing weapons at our troops, then, most certainly, we'd like to talk to him about it.
"We'd be interested to talk to anyone who has done that. We don't take kindly to attacks on our soldiers -- even attacks by people like Mr Hicks."
The American file is consistent with a letter Hicks wrote to his family in Adelaide in which he admits to firing hundreds of bullets in Kashmir at the enemies of Islam.
In a March 2000 letter, Hicks told his family "don't ask what's happened, I can't be bothered explaining the outcome of these strange events has put me in Pakistan-occupied Kashmir in a training camp. Three months training. After which it is my decision whether to cross the line of control into Indian-occupied Kashmir."
The training camp was run by Lashkar-e-Toiba, the army of the pure, Islamic fundamentalists fighting to free Muslims under Indian rule and designated a terrorist group by Australia in 2003.
In another letter on August 10, 2000, Hicks wrote from Kashmir, claiming to have been a guest of Pakistan's army for two weeks at the front in the "controlled war" with India.
"I got to fire hundreds of bullets. Most Muslim countries impose hanging for civilians arming themselves for conflict. There are not many countries in the world where a tourist, according to his visa, can go to stay with the army and shoot across the border at its enemy, legally."
Australia has an extradition relationship with India as a fellow member of the Commonwealth that could allow the transfer of a suspect in special circumstances.
Hicks has been detained at Guantanamo Bay in Cuba since being captured in Afghanistan in 2001 where he was fighting alongside Taliban forces.
US prosecutors last week announced Hicks will face a US Military Commission to answer new charges of attempted murder and providing material support to a terrorist organisation.
LET has waged a brutal insurgency aimed specifically at "destroying" India and "annihilating" Hinduism and Judaism, having proclaimed Hindus and Jews to be enemies of Islam.
It has over the years - including 2000 when Hicks was apparently in action with it - waged a war not just targeting Indian troops in Kashmir, but also rounding up Hindus and Sikhs in the disputed territory and massacring them.
LET militants in 2000 massacred 35 Sikhs in the village of Chittisinghpura.
Since hostilities broke out in earnest in Kashmir in 1989, an estimated 5000 Indian soldiers and paramilitaries have been killed. Estimates are, too, that 80,000-odd civilians have perished, and hundreds of thousands of others have been displaced from their homes.
John Howard yesterday expressed extreme frustration at the time the US is taking to bring Hicks to trial, vowing to press them "almost daily" over the matter.
The US last week began the process of charging Hicks. But US officials have admitted the final charges could be a month away - falling short of an Australian request that the issue be dealt with by the middle of February. And they have admitted a full trial could be as much as a year away.
The Prime Minister said he was reasonably satisfied that the process was now in train, but was concerned about how long it might be before Hicks actually goes to trial.
"Let me, without getting into the weeds of the technical jargon, let me simply say that it has gone on for so long now that we will be pressing the Americans almost on a daily basis," Mr Howard told Southern Cross Broadcasting.
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