The suspected killer of Rwanda's Queen Rosalie Gicanda has been arrested in Uganda.

There is no time limit for justice, whether it comes fast or slow it is something we want to see.

Idelphonse Nizeyimana is one of the most wanted suspects in the country's 1994 genocide - which killed the queen, along with 800,000 Tutsis and moderate Hutus - and he has now been extradited to Tanzania for trial at a UN-backed tribunal, accused of organising the murders.

Speaking about Nizeyimana - who was an intelligence chief at the time of the genocide - the spokesman for the prosecutor-general said: "There is no time limit for justice, whether it comes fast or slow it is something we want to see."

Although Rwanda welcomed the arrest they would rather he be tried in his country.

Army captain Nizeyimana was head of intelligence and military operations at Rwanda's elite military training school, the ESO, during the genocide.

He is accused of elaborating, adhering to and executing a plan to wipe out the Tutsis - the minority in a country ruled by a Hutu government for more than three decades.

He is accused of setting up special military units to help carry out the slaughter.

One of these units is believed to have killed Queen Rosalie Gicanda, widow of King Mutara III who died in 1959 shortly before the country became a republic.

Rwandan justice minister Tharcisse Karugarama: "I think that justice has arrested this guy."