Mohammed Deif

Mohammed Diab Ibrahim al-Masri (Arabic: محمد دياب إبراهيم المصري, romanized: Muḥammad Diyāb Ibrāhīm al-Maṣrī;‎ 12 August 1965 – 13 July 2024), better known as Mohammed Deif (Arabic: محمد الضيف), was a Palestinian militant who served as the sixth commander of the Izz al-Din al-Qassam Brigades. He succeeded Salah Shehade following the latter's assassination in an Israeli airstrike in July 2002, until his assassination in July 2024. He was succeeded by Mohammed Sinwar, the younger brother of Yahya Sinwar. He was a central figure in the Gaza war and one of the masterminds of the October 7 attacks, alongside Yahya Sinwar.

Deif was born in 1965 in the Khan Yunis Refugee Camp in the Gaza Strip, to a family that had fled or been expelled during the 1948 Palestine war. He reportedly left school temporarily to support his low-income family, later graduating with a bachelor's degree in chemistry from the Islamic University of Gaza in 1988, where he had established a theater group.