Ben-Barka was kidnapped in front of the Brasserie Lipp here and his body was later found buried in a garden in Paris.  The French espionage agency the SDECE was responsible for his murder. King Hassan II sought there help because Ben-Barka was trying to overthrow him.  Mossad was also involved in the murder to keep King Hassan II in power so Morocco would not become an ally of Egypt.

Mehdi Ben Barka (born 1920 – disappeared October 29, 1965) (Arabic: المهدي بن بركة‎) was a Moroccan politician, head of the left-wing National Union of Popular Forces (UNPF) and secretary of the Tricontinental Conference. An opponent of Hassan II, he "disappeared" in Paris in 1965. Despite countless theories attempting to explain what really happened to him, the exact circumstances of his disappearance have never been established, and as of 2009, investigations are on-going.

• http://en.wikipedia.org/wiki/Mehdi Ben Barka
• http://www.time.com/time/magazine/article/0,9171,945444,00.html
• Thomas, G., 1995, 2007, Gideon’s Spies: The secret history of the Mossad: Thomas Dunne Books, New York, 616p.