India has raised with China the issue of its supply of two more nuclear reactors to Pakistan as part of its pre-2004 deal for civil nuclear cooperation with Islamabad.
Besides China, India was also "in touch" with a number of its partner countries from NSG through dialogues and discussions to seek more information on the cooperation between China and Pakistan, official sources said in New Delhi on Sunday.
However, the sources maintained that an official "demarche" has not been done with China.
"The Chinese side is aware of our interests and concerns...If you ask whether an official demarche has been issued, no. There are other opportunities and occasions to raise such issues and we have done that," a top source said.
"They (Chinese) have told us that it is for peaceful purposes," the source said.
The sources also maintained that the issue, which was of "interest and concern" of India was very "much on radar" of government and it was in touch with other countries on the matter.
However, they said, India could only articulate its concerns and ultimately it was only up to NSG to take a call whether they were new additions or were "grandfathered" by the earlier deal.