PARIS (AP) _ France's highest court on Wednesday rejected a final appeal by the man known as Carlos the Jackal, who is serving a life sentence for the 1975 murders of two French secret agents and an alleged informer.

Carlos, whose real name is Ilich Ramirez Sanchez, was convicted in 1997 for the murder of intelligence agents Raymond Dous and Jean Donatini, and of a Lebanese man, Michel Moukharbal, whom Ramirez suspected of being an informer.

The agents were investigating Ramirez's role in attacks on Israel's El Al airlines at Paris' Orly Airport.

The Venezuelan-born Ramirez gained international notoriety as the Cold War-era mastermind of deadly bombings, assassinations and hostage dramas.

He carried out the 1975 seizure of OPEC oil ministers and is suspected of involvement in the 1976 Palestinian hijacking of a French jetliner to Entebbe, Uganda, that ended with an Israeli commando raid.

Austria has asked France to extradite Ramirez for his role in the OPEC affair. But a French appeals court on Wednesday deferred a decision, saying it required further information from Austrian authorities. A ruling is now expected in September.

Ramirez was caught in Khartoum, Sudan, in 1994 and hauled to Paris by French agents in a sack.

Ramirez is currently under investigation in four attacks in Paris in the 1970s.