The UN's human right chief Navi Pillay called Monday on Libya's interim rulers to ensure that Muammar Gaddafi's son Seif al-Islam and spymaster Abdullah Senussi are treated humanely.
"The arrests of Gaddafi's son and the former director of military intelligence have enormous significance for the future of justice in Libya," said the UN High Commissioner for Human Rights.
"The Libyan authorities, in keeping with the public commitment they made, should ensure that Seif al-Islam Gaddafi and Abdullah Senussi are detained in humane conditions," she added.
The UN rights chief also urged the Libyan authorities to "cooperate fully" with the International Criminal Court, which has issued arrest warrants for both men.
Ignoring world pressure, Libya's interim rulers have insisted that Seif, Gaddafi's one-time heir apparent, would be tried inside Libya rather than at the ICC in The Hague.
World powers, fearful that Seif would not be given a fair trial after his father was felled by a bullet to the head after being captured exactly a month ago, are urging Libya to work with the ICC.
Ex-spy Senussi was captured in the south of the country on Sunday, some 24 hours after Seif, officials said.
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