Swedish prosecutor Ingrid Isgren arrived at the Ecuadoran embassy in London Monday, an AFP correspondent said, for the questioning of WikiLeaks founder Julian Assange in the latest twist in a long diplomatic and legal dispute.

Isgren will be present while Assange, who has been holed up at the embassy since 2012, is questioned by an Ecuadoran prosecutor over a 2010 rape allegation in Sweden that the activist has repeatedly denied.