FRIDAY, 11 JULY 1975 FRONT PAGE DIPLOMATS SAID TO BE LINKED WITH FUGITIVE TERRORIST KNOWN AS CARLOS Paris, 10 July - France expelled three high-ranking Cuban diplomats today in connection with the world-wide search for a man called Carlos, who is believed to be an important link in an international terrorist network. The suspect, whose real name is thought to be Ilyich Ramirez Sanchez, is being sought in the killing of two French counter-intelligence agents and a Lebanese informer at a Latin Quarter apartment on 27 June. The three killings have led the police here and in Britain to what they feel is the trail of a major