A senior FBI team will come to New Delhi for a week with the new information to unravel the terrorist plot hatched by David Coleman Tahawuur Headley and Rana and their connection with the killing of Mumbai, National Security Advisor MK Narayanan said here.

The decision by the Federal Bureau of Investigation (FBI) to come to India after an intense debate between Prime Minister Manmohan Singh and U.S. President Barack Obama in Washington Tuesday.

"We are examining the problem. We are willing to do everything possible to unravel the conspiracy," Narayanan quoted Obama as saying Manmohan Singh during their talks in which issues relating to Pakistan and Mumbai carnage prominence.

During discussions, the prime minister had expressed concern over rising new centers of terrorism, especially in the vicinity, said Narayanan.

With regard to the promise of the U.S. "to provide vital clues about a prominent Pakistani connection with the killing of Mumbai, Narayanan said him and Interior Minister P. Chidambaram will talk to the FBI director about it.

It is estimated that 166 people were killed and 244 injured when 10 Pakistani terrorists sneaked into Mumbai, and hell broke loose in the city, 26-28 last November. Proactive FBI probe Headley Rana is an extension of the fight against terrorism new framework agreement, signed during Manmohan Singh's visit to Washington.

Now the security relationship between the two countries unreservedly, official sources said here. If either party obtains the confidential information affecting the other, it will go quickly to the information.

On the eve of Manmohan Singh's visit to USA a week ago, the American India had revealed that his research has shown that the link in the terrorist plot hatched by Headly and Rana to the elements of the Pakistani spy agency ISI. In one week, the U.S. India will likely provide important clues about a Pakistani sources linked to the carnage in Mumbai, official.

CIA chief Leon Panetta publication of Headley-Rana links to elements in the ISI Narayanan, when it met in New Delhi on Saturday.