The US today said it has briefed the Indian government on the case of David Headley Coleman, nabbed by FBI last month for plotting a major terror attack in India at the LeT's behest, and continues to follow the matter.

"I know that our Ambassador (Tim Roemer) has briefed the government of India on the case, and we continue to follow the case," State Department Spokesman Ian Kelly told reporters in response to a question at his daily news briefing.

49-year-old Headley was arrested last month at Chicago's O'Hare International Airport as he prepared to board a flight to Philadelphia, intending to travel to Pakistan. FBI also arrested another person, Tahawwur Hussain Rana, 48, a Canadian citizen of Pakistani origin, in the case.

Kelly refused to divulge any further information about the case, stating that the issue is sub-judice.

"I'm not at liberty to divulge the details of the interrogation. It's an ongoing legal case, and it really is up to the Department of Justice .... That's really in their purview," he said.

"But I do know that we have briefed the Government of India on the broad parameters of the case," Kelly said.