Roger Sanchez | Sonia Sanchez | Samuel Sánchez | Richard Ramirez | Mark Sanchez | Arantxa Sánchez Vicario | Marta Sánchez | Maria Quiñones-Sanchez | Édgar Ramírez | Raúl Ramírez | Lawrie Sanchez | Hanley Ramírez | Danny Perez Ramírez | Ariel Ramírez | Aníbal Sánchez | Junior Sanchez | Hugo Sánchez | Héctor Fernando Ramírez | Gonzalo Sánchez de Lozada | Eddie Sanchez | Diego Sanchez | Dennis Sanchez | Alex Sánchez (boxer) | Roberto Sánchez Ramos | Ram Ramirez | Poncho Sanchez | Miguel Ángel Cordero Sánchez | Michael Ramirez | Kiele Sanchez | Johnny Sanchez |
On 21 December 1975 he was taken hostage by the Venezuelan terrorist Carlos the Jackal during an OPEC meeting.
In 1994, he was active in the capture of terrorist Ilich Ramírez Sánchez (aka "Carlos the Jackal") in Sudan, by tracking down Sánchez inside Sudan and making Sheikh Hassan al-Turabi and the Sudanese government admit that they were harboring him.
Stasi files opened after 1989 indicated that the bombing was carried out by a group under the direction of Ilich Ramírez Sánchez (AKA Carlos the Jackal), and paid for by Nicolae Ceaușescu, president of Romania.
On 30 December PFLP assassin Carlos the Jackal, Ilich Ramírez Sánchez called on Sieff's home on Queen's Grove in St John's Wood and ordered the maid to take him to Sieff.