South Sudan has criticised the revoking of US visas for all its nationals, saying it was based on an incident involving a citizen of a different African country.
US Secretary of State Marco Rubio announced the visa ban on Saturday, citing South Sudan's refusal to accept the return of its citizens being removed from the US.
But South Sudan's foreign ministry said that a man who was refused entry after being deported from the US was a citizen of the Democratic Republic of Congo.
It added that the individual was "returned to the sending country for further processing".
