The head of the IPS’s Transnational Institute in London was Marxist Tariq Ali (I believe he was a Pakistani). They had lots of ties to communist movements and governments around the world, esp. in Europe and the Middle East/Asia Minor.
Orlando Letelier, a Chilean Marxist, was the IPS/TNI operative, often using East Germany as a place of operations.
Congress has never held a hearing on who he really was and what was found in his briefcase after he was killed in a bomb explosion in DC. Letelier also was the “pet project” and “Chilean socialist” of the reds in Congress, including Ted Kennedy, I think Bella Abzug, Don Fraser, and most of the HY/California red representative.
Also, when Black September held the Israeli Olympics hostages capitve, they wanted to trade them for members of the Red Army Faction.