A Rwandan ex-paramilitary police chief found guilty of genocide by a UN-backed war crimes tribunal has been acquitted on appeal.

Gen Augustin Ndindiliyimana's sentence in 2011 was the 11 years he had already spent in custody awaiting trial.

He was one the most senior figures to be sentenced by the International Criminal Tribunal for Rwanda (ICTR).

He was put on trial with ex-army chief Gen Augustin Bizimungu, who was given 30 years and is also appealing.

Two other officers were convicted with the generals and their appeal verdicts were also announced on Tuesday.

Major Francois-Xavier Nzuwonemeye was acquitted and his second in command, Capt Innocent Sagahutu, had his jail term reduced from 20 to 15 years.

Gen Ndindiliyimana and Gen Bizimungu were two of the three most senior military figures tried by the court based in the Tanzanian town of Arusha.

Some 800,000 ethnic Tutsis and moderate Hutus were killed in 100 days in 1994.