Wadie Haddad
The Andrew and Mitrokhin publications briefly describe the history of the PLO leader, Yasser Arafat, who established close collaboration with the Romanian Securitate service and the KGB in the early 1970s. The KGB provided secret training for PLO guerrillas. However, the main KGB activities and arms shipments were channeled through Wadie Haddad of the PFLP organization, who usually stayed in a KGB dacha BARVIKHA-1 during his visits to the Soviet Union. Led by Carlos the Jackal, a group of PFLP fighters carried out a spectacular raid on the Organization of Petroleum Exporting Countries office in Vienna in 1975. Advance notice of this operation "was almost certainly" given to the KGB.