Hundreds of people are demonstrating outside the British Embassy in Rwanda, saying they will not return home until a military general detained in the UK is set free.

The detention in London of Lt. Gen. Karenzi Karake, who serves as Rwanda's spy chief, has prompted an angry response from Rwanda's government, which says the charges against Karake are politically motivated.

Karake, a close ally of Rwandan President Paul Kagame, was one of 40 members of the Rwandan military indicted in 2008 on charges of terrorism and genocide by Spanish National Court Judge Fernando Andreu.

Rwandan Foreign Minister Louise Mushikiwabo called the arrest "an outrage," adding "Western solidarity in demeaning Africans is unacceptable."

The people protesting outside the British Embassy here echoed similar sentiments with placards demanding Karake's freedom.