Rwandan genocide suspect Fulgence Kayishema has been arrested in South Africa, the UN tribunal for war crimes committed in Rwanda said on Thursday.

He was arrested on Wednesday after being on the run since 2001. Kayishema is alleged to have orchestrated the killing of approximately 2,000 Tutsi at the Nyange Catholic Church during the 1994 genocide in Rwanda, the International Residual Mechanism for Criminal Tribunals said.

“Fulgence Kayishema was a fugitive for more than 20 years. His arrest ensures that he will finally face justice for his alleged crimes,” IRMCT prosecutor Serge Brammertz said.