Urabi served as a major for one of the regular Palestinian Liberation Army units within the Syrian Army. He sympathized with Ba'athism, an ideology promoting pan-Arabism and socialism and was a close military adviser and friend of Hafez al-Assad. Urabi enlisted with al-Assifa, the armed wing of Fatah, in the late 1950s. Al-Assad, who was Defense Minister at the time, selected Urabi in 1966 to head the operations of Fatah—which was based in Syria—and instructed Yasser Arafat and other Fatah leaders to recognize Urabi's authority.
Death
On 5 May 1966, during a meeting chaired by Urabi to alleviate tensions between Arafat and Ahmed Jibril in the Yarmouk Refugee Camp, Urabi was assassinated. Consequently, Arafat along with his aide Khalil al-Wazir and several other Fatah officials were arrested and imprisoned on al-Assad's orders. Al-Assad personally interrogated al-Wazir and the officials who denied being present at the scene. The circumstances of Urabi's killing at Yarmouk are disputed. Al-Wazir claimed that al-Assad, Jibril and the Military Intelligence Directorate had planned to assassinate Arafat using Urabi to lure the latter into a trap. Jibril aborted the meeting at the last minute and Arafat also did not attend without notifying Jibril. Instead, the former sent a Palestinian Syrian Army officer named Adnan and the latter sent a colleague, Mohammed Hishme with bodyguard Abdul Majib Zahmud who was to remain outside of the meeting. According to Zahmud, a loud argument took place with Adnan yelling at Urabi. Then, Adnan allegedly shot and killed both Urabi and Hishme before fleeing the scene. Arafat and al-Wazir were arrested, but both claimed they were not present at the scene because of an emergency meeting with another intelligence officer, Ahmed Sweidani. They were later pardoned by President Salah Jadid after Sweidany confirmed their statement. In contrast, according to Palestinian writer Said Aburish, Urabi was defenestrated from a third-floor window and died immediately. While Arafat was not present when Syrian police arrived to the crime scene, he had sought refuge in a Syrian police coronel house. He then pleaded President Jedid for protection, but was subsequently detained by police on al-Assad orders. Arafat and al-Wazir were moved to the Mezzah prison and kept in solitary confinement. Assad appointed a three-man jury to investigate the case, which found Arafat guilty, sentencing him to death. But finally Jedid released Arafat and closed the file.