New Delhi, Oct 29 (IANS) Home Minister P. Chidambaram Thursday said the Federal Bureau of Investigation (FBI) had shared documents with India about the arrest of the American national, whom the Lashkar-e-Taiba (LeT) planned to use for a terror strike in India, before making it public.

"They showed us the complete file and affidavit sometime before it was made public," Chidambaram told reporters here.

The FBI Tuesday said the Pakistan-based terror group, blamed for the 26/11 Mumbai terrorist attack, was planning to use an American national to carry out another major terrorist attack in India.

The man, identified as David Coleman Headley, was arrested early this month by the FBI's Joint Terrorism Task Force at O'Hare International Airport before boarding a flight to Philadelphia, intending to travel on to Pakistan.

According to the FBI affidavit filed in a Chicago court, Headley was in close contact with Ilyas Kashmiri and several unidentified leaders of LeT. Kashmiri, the operational chief of Pakistan-occupied Kashmir section of Harakat-ul Jihad Islami (HUJI), a Pakistani-based terrorist organisation with links to Al Qaeda, is presently believed to be in Pakistan's restive Waziristan tribal region.

Chidambaram added that Indian authorities were working with FBI to do whatever was necessary in India.