LONDON - Rwanda's intelligence chief Karenzi Karake, who is wanted in Spain for war crimes, has been arrested in London.
Gen Karake, 54, was arrested at Heathrow Airport on Saturday, and remanded in custody ahead of a court hearing on Thursday.
He is accused of ordering massacres while head of military intelligence in the wake of the 1994 Rwanda genocide.
Louise Mushikiwabo, Rwanda's foreign minister called the arrest "an outrage".
Gen Karake is also accused of ordering the killing of three Spanish nationals working for Medicos del Mundo.
In 2008, a Spanish judge indicted him for alleged war crimes along with 39 other current or former high-ranking Rwandan military officials.
He was arrested by Metropolitan police officers under the European Arrest Warrant.
But the Rwandan government is said to be puzzled by the timing of Gen Karake's arrest, as he had travelled to the UK several times since the indictment was issued.
Williams Nkurunziza, Rwanda's High Commissioner to the UK, called the arrest "an insult".
"We take strong exception to the suggestion that he's being arrested on war crimes," he told the BBC World Service.
"Any suggestion that any of our 40 leaders are guilty of crimes against humanity is an insult to our collective conscience."