Brazil and Argentina's recognition of a Palestinian state is premature, US Undersecretary of State William Burns said during a visit to Chile on Friday.
"We believe such recognition is premature," Burns told reporters in the Chilean capital, Santiago, and added "It's only through negotiation between the parties themselves, Palestinians and Israelis, that we'll be able to realize the two-state solution."
Argentina's government said on Monday it had decided to recognize a Palestinian state based on borders before the 1967 war, following a similar move days earlier by neighboring Brazil. Uruguay also voiced recognition.
Israel this week called the Latin American countries' recognition of a Palestinian state "highly damaging interference" by countries that were never part of the Middle East peace process.
Israel disputes the Palestinian claim on all the West Bank and East Jerusalem, land it captured from Jordan in the 1967 war and has since extensively settled.