Rwandan officials have requested the extradition from Britain of four suspected masterminds of the 1994 genocide.
Rwandan Justice Minister Tharcisse Karugarama Tuesday confirmed the request. He said the four have changed their names to make it difficult for authorities to apprehend them.
The British Home Office would not comment on the extradition requests.
Officials say three of the suspects - Munyaneza Charles, Celestin Ugirasebuja and Emmanuel Ntezilyayo - are former Hutu leaders, while the fourth suspect, Vincent Bajinya, has been working as a doctor for a London-based charity organization.
The four face charges of genocide and crimes against humanity. If convicted, they could face the death penalty, which could further hamper extradition efforts. However, Rwanda is considering abolishing capital punishment.
During the 1994 genocide, Hutu extremists massacred some 800,000 minority Tutsis and politically moderate Hutus.
Some information for this report was provided by AP and Reuters.