Vale of Glamorgan MP Alun Cairns has said that the Argentine foreign minister compared Britain's control of the Falkland Islands to Israeli settlers in the West Bank.
Mr Cairns said he found the comparison, which was made during a meeting of the all-party group on Argentina, "offensive" and "pretty outrageous".
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The incident took place in the city of Aurora, Illinois.
Remaining mild but not quite as warm as recently.