Latest: Argentina demands answers from Brazil over Falkland Islands flights

Update 1:20am: Argentina reminded Brazil of its commitment "to not allow British airplanes or warships based in the disputed archipelagos" in accordance with agreements among member nations of the regional blocs Mercosur and Unasur.

"The Brazilian foreign ministry reaffirmed its support to our country on this issue and said that it was unaware of these flights," the Argentine statement said.