Diplomat Issue: U.S. Talks To India, PM Asks For Full Resolution

"Just regretting and completing a formality is not acceptable. We are not happy. They will have to apologise," Nath told media persons, reacting to Kerry's call.

The envoy's father, Uttam Khobragade, a former Maharashtra bureaucrat, has threatened to launch a hunger strike if his daughter is denied justice in the U.S.

"I will wait for the developments and go to New Delhi next week. I shall try to meet Prime Minister Manmohan Singh and UPA chairperson Sonia Gandhi. But if my daughter does not get justice, I plan to launch a hunger strike," Khobragade told IANS.

Sherman called up Singh to discuss specific steps during which the statement by Manhattan's India-born U.S.  attorney Preet Bharara came up, defending his department's action against Khobragade.

It was learnt that Sherman distanced herself from Bharara's statement.

India also hit back at Bharara for saying Khobragade was not handcuffed and was extended all courtesies and also accused the US of interfering with the Indian legal system.

Describing Khobragade as the "only ... victim" in this case, the external affairs ministry said the action taken against her violated the Vienna Convention.

"There were no courtesies in the treatment meted out to the diplomat, under the normal definition of that word in the English language," said spokesman Syed Akbaruddin.

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