The international police agency has already issued “red notices” seeking the arrest of Muammar Qaddafi and one of his sons, the politically prominent Seif Al-Islam Qaddafi, as well as Qaddafi intelligence chief Abdullah Al-Senussi.

The whereabouts of those three remain a mystery more than a month since Muammar Qaddafi’s rule was toppled.

Lyon-based Interpol said it issued an alert for Saadi Qaddafi at the request of Libya’s new authorities, who accuse him of leading military units responsible for crackdowns on protests and of misappropriating property.

Niger has said it placed Saadi Qaddafi under surveillance after he was intercepted crossing its desert frontier. Niger officials were not immediately available to comment on the Interpol arrest notice.

Of Qaddafi’s six other sons, two fled to Algeria, one was reported killed in the conflict and three, including Seif Al-Islam, are at large.