The Palestinian Prisoner Society (PPS) on Monday said that four Palestinian prisoners have been on hunger strike for different periods in Israeli jails in protest at their administrative detention.
The PPS said that prisoner Hasan al-Awiwi who started his hunger strike 56 days ago was transferred to hospital on Sunday as his health condition has severely deteriorated.
Al-Awiwi 35 a father of three is an ex-prisoner who was re-arrested on 15 January.
On 18 May Thaer Bader 43 joined the hunger strike for the same reason. Bader was supposed to be released on 14 May after he had served several years in Israeli jails but the Israel Prison Service decided to hold him without charge or trial.
Bassam Abu Akar a father of seven has spent a total of 24 years in Israeli lock-ups. He started a hunger strike on 21 May against his administrative detention for the second year in a row.
Ahmad al-Horoub 30 an ex-prisoner has been on hunger strike since 21 May.