The detainees studies centre, Ahrar, said that an Islamic Jihad supporter marked his 33rd year in Israeli jails on Friday.
Ahmad Abdel Rahman Abu Hasirah, 58, from Gaza, was detained and accused of hurling explosives at Israeli military jeeps in the 1970s, according to the centre.
Additionally, Ahrar reported that Israeli authorities released the director of the Detainees Support Association in Hebron on Thursday afternoon, following a lengthy administrative detention sentence.
Ahmad Za'atari, 34, served 30 consecutive months in administrative detention, and was detained on 28 August 2007 from his Hebron home, according to Fouad Al Khafsh, director of the detainees studies center, Ahrar.
Za'atari holds a bachelor's degree in Chemistry and is married with two daughters. He has spent a total of eight years in Israeli detention.