Six Palestinian prisoners in Israeli jails are continuing their hunger strike to protest their administrative detention, including a girl with Jordanian and Palestinian nationality, the Palestinian Prisoners' Club said.

The system of administrative detention, inherited from the British Mandate of Israel, allows anyone to be held for six months without charge under a renewable administrative decision for an indefinite period of time, which opponents consider a flagrant violation of human rights.

The charges against those placed in administrative detention are not known and their files are confidential.

Among the prisoners on hunger strike is Ahmad Ghannam, 42, who began his strike 86 days ago, from Hebron in the southern West Bank.

According to the club, the prisoner Ghannam suffers from leukemia and needs health follow-up because of his weak immunity, and has been detained since last June, a prisoner editor who had spent about nine years in the prisons of the occupation.

In addition to Ghannam, the hunger strikers are Ismail Ali, 30, who has been on hunger strike for 75 days, Tariq Qadan, 46, for 68 days, Ahmad Zahran, 42, for 15 days, and Musab al-Hindi, 29. 13 days ago.

Hiba al-Labadi, 24, who holds dual Palestinian and Jordanian citizenship, went on hunger strike 13 days ago. She was arrested while crossing the King Hussein Bridge as she was going to visit her family in the West Bank.

Hiba al-Labadi was transferred to administrative detention after spending 25 days investigating security charges. Her arrest caused an uproar, and Jordanian activists were invited through Facebook to organize sit-ins to protest her detention.

According to the Prisoners' Club, there are about 500 administrative prisoners in Israeli prisons, out of 6,000 Palestinian prisoners.