High Quality Content by WIKIPEDIA articles! The Jibril Agreement was a prisoner exchange deal which took place on May 21, 1985 between the Israeli government, headed by Shimon Peres, and the Popular Front for the Liberation of Palestine - General Command. As part of the agreement, Israel released 1,150 security prisoners held in Israeli prisons in exchange for three Israeli prisoners (Yosef Grof, Nissim Salem, Hezi Shai) captured during the First Lebanon War. This was one of several prisoner exchange agreements carried out between Israel and groups it classified as terrorist organizations around that time. Among the prisoners released by Israel were Kozo Okamoto - one of the perpetrators of the Lod Airport Massacre who had been sentenced to life imprisonment, and Ahmed Yasin—a Gazan Muslim Brotherhood leader (and later spiritual leader of Hamas)—who was sentenced to 13 years imprisonment in 1983.