Haniyeh participated in protests in the First Intifada and was given a short prison sentence by an Israeli military court. He was detained by Israel again in 1988 and imprisoned for six months. In 1989, he was imprisoned for three years.Following his release in 1992, the Israeli military authorities of the occupied Palestinian territories deported him to Lebanon with senior Hamas leaders Abdel-Aziz al-Rantissi, Mahmoud Zahhar, Aziz Duwaik, and 400 other activists. The activists stayed at Marj al-Zahour in southern Lebanon for over a year, where, according to BBC News, Hamas “received unprecedented media exposure and became known throughout the world”. A year later, he returned to Gaza and was appointed dean of the Islamic University.