Ntagerura was a member of the Interim government in 1994. He was arrested in Cameroon in 1996 on charges of genocide.
He was acquitted in 2004 after the court said the prosecution had not proved beyond reasonable doubt that he was involved in the killings in which 800,000 Tutsis and moderate Hutus died at the hands of Hutu extremists.
In early 2006, an appeals court upheld the acquittal after the prosecutor sought a re-trial.
André Ntagerura currently lives in Arusha, in a "safe house" paid for by the ICTR, alongside two other acquitted persons, General Gratien Kabiligi - acquitted in December 2008 - and Protais Zigiranyirazo, a brother-in-law of the late president Habyarimana who was found not guilty in November 2009.
"The registrar has been pursuing its efforts to find a place for Ntagerura for almost five years. His case has now been brought before the Secretary-General. We know that the UN is taking this emblematic case very seriously", ICTR Spokesman Roland Amoussouga told Hirondelle News Agency on Thursday.
"ICTR has requested help from the Secretary-General and from UN's office of Legal Affairs", Amoussouga added, underlining that the two other acquitted persons were not forgotten.
The ICTR has so far acquitted eight defendants, five of them having found host countries. Former mayors Ignace Bagilishema and Jean Mpambara now live in France; former préfet Emmanuel Bagambiki lives in Belgium; former Minister of Education André Rwamakuba joined his family in Switzerland ; and Father Hormisdas Nsegimana joined a parish in Northern Italy.
© Hirondelle News Agency