The legendary Marxist terrorist Carlos the Jackal gave an interview to a Swiss newspaper in which he explained that he was able to easily travel through Switzerland because of the supposedly-neutral country’s “nonaggression pact” with the Palestinian Liberation Organization (PLO).

Carlos, whose real name is Ilich Ramírez Sánchez, spoke the Neue Zuercher Zeitung by phone from his French prison cell.

He specifically referred to his 1975 attack on OPEC’s headquarters in Vienna, in which he killed three people and took 60 hostages. He explained that he chose to fly into Zurich and then enter Austria because Swiss authorities would not arrest PLO terrorists as long as they did not harm Swiss targets.

Sánchez says that he even saw a picture of himself on a wanted poster in the Zurich passport control booth yet he was still allowed to enter the country.

Reports of the secret agreement between Switzerland and the PLO first came to light in January. While the specific details of the deal will remain classified until 2020, it is believed that the Swiss government agreed to give diplomatic support to the Palestinians in exchange for assurances the PLO would not carry out terror attacks against Swiss targets.