Asked by a reporter on Tuesday at the Department briefing "if freedom of speech gives one a right to call for disintegration of another country," Deputy Spokesperson Robert Palladino replied: "We have freedom of speech in the United States, we have freedom of association, and these are bedrock principles of American society."
The reporter was referring to the "Referendum 2020" campaign on Punjab's secession by a New York-based organisation called Sikhs for Justice.
Asked if the State Department was looking into it, Palladino said: "I'm not aware of it. That's -- I mean, I'm just not aware of it today. I haven't seen these reports."
The US has constitutionally mandated broad freedom of speech protection actively enforced by courts that cover most expressions of opinions except for active calls for violence or some foreign government-financed campaigns.
Several separatist movements campaign in the US, including "Yes California", which wants the state to secede from the US.
(With inputs from agencies.)