New Delhi has sought extradition of Pakistani-American LeT terrorist and Mumbai terror accused David Headley and his accomplice Tahawwur Hussain Rana from the US.

External Affairs Minister Salman Khurshid has written to his US counterpart Hillary Clinton requesting their extradition.

Official sources said that Khurshid has written the letter to Clinton for extradition of the two before their sentencing there in January.

Sources say, India is hopeful that the US will take a favourable decision on its request which was sent in the first week of November. New Delhi is awaiting a response from Washington.

During her visit to New Delhi last month, US Under Secretary for Political Affairs Wendy Sherman had said India's request for extradition of Headley was under consideration and a decision could be taken soon.

Though, India had limited access to 52-year-old Pakistani-American Headley, who conducted a reccee for the 26/11 Mumbai terror attack targets for the LeT, it has so far not been able to quiz his Pakistani-Canadian businessman friend Rana.

New Delhi's requests for access to Headley's wife Shazia Gilani, his girlfriend Portia Peter, one more female friend are also yet to be acceded by Washington.

Sources also said talks were being planned between the Ministry of Home Affairs and the US Department of Justice to discuss a series of issues, including Headley and Rana.