Argentina's foreign minister Hector Timerman clashed with MPs when he appeared before the all-party group on Argentina.
Mr Timerman told the MPs that Argentina would not recognise a referendum of the islanders planned for next month on whether they want to remain part of the UK. He said:
The self-determination referendum doesn't apply to the Malvinas. It is not a colonised people, it is a colonised territory.
It is not a matter for negotiation. Not one single country in the world recognises the sovereignty of the United Kingdom in the Malvinas.
We have to respect the interests of the people living in the area but not the wishes.
More top news
Passengers cry out and prayers are heard as a plane endures turbulence so severe it forced the pilot to take an unscheduled landing.
Michael Swain says the 'fantastic' surgery has made a huge difference to his life.
The brother of a teen who disappeared in 1979 has told ITV News he is "convinced" he was a victim of an alleged Westminster paedophile ring.