Palestinian Political Prisoners
The numbers vary but range at any time from over 7,000 to 12,000 or more. In April 2008, the Adalah Legal Center for Arab Minority Rights in Israel cited 11,000, including 345 children and 98 women. Over 1,000 suffered from chronic or other diseases. Around 150 were seriously ill from heart disease, cancer, and other diseases, and 195 or more Palestinians died or were killed in prison since 1967.
As of January 2009, Adalah said about "22,500 individuals were imprisoned or detained in Israeli prisons; around 70% (or 15,750 are) Arabs." Included are 9,735 Palestinians, nearly 80% classified as "security." Of these, 570 were administrative detainees, uncharged by order of an administrative official, not a judge.
Another 20 were so-called "unlawful combatants" under Israel's Unlawful Combatants Law (UCL), saying they're not entitled to POW status under international law because they either took part in hostilities against Israel (directly or indirectly) or belong to a force carrying them out. No proof is needed, only "a reasonable basis for believing" the designation is accurate, and under UCL, detentions can be permanent, without trial or judicial fairness.