"We expect our diplomat to be given exactly the same courtesies that we extend to American diplomats or diplomat of any other country," Singh said.
Criticising the action against Khobragade by the US authorities, she said the way the senior diplomat was treated was not acceptable.
"You do not treat an Indian diplomat in this manner whether its in the US or any other country," she said when asked about the issue at a function here.
Khobragade was put through both strip and cavity searches, procedures normally used for criminals, evoking a sharp reaction from India.
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India yesterday demanded that the case against senior Khobragade be dropped unconditionally. It had on Tuesday taken a slew of retaliatory steps to strip US diplomats and their families of privileges including withdrawing all airport passes and stopping import clearances for the US embassy.
"India has shown spine at everything we have done since our Independence in 1947, including our own foreign policy making, whether it is on non-alignment, whether it is on Bangladesh or on any other issue.
"Whether it is our economic policies or any other issue, we have followed our own path determined by our national interest and how we see the world and we continue to do so," she said.