Britain spied on the Argentine government for five years amid fears of another attempt to reclaim the Falkland Islands, it has been claimed.
Documents released by American whistle-blower Edward Snowden are said to allege that British agents were actively spying on Argentina between 2006 and 2011.
The large scale operation may have involved implanting computer viruses, circulating false propaganda and collecting intelligence with the aim of diminishing or discrediting the Argentine government, according to the BBC.
The reports were published on Friday by several Argentine news agencies.
There has been no formal response from either the British or Argentine government to the allegations.
Last month, the British government announced plans to bolster the Falkland Islands garrison amid fears of a renewed threat from Argentina, 33 years since the war, which saw more than 900 servicemen killed.