Palestinian sources say the inmate, whose name has not been released, died in the Israeli prison in Be’er Sheva.
On Wednesday, Palestinians staged a sit-in to raise awareness on the condition of Palestinian prisoners and hunger strikers such as Samer Issawi.
Issawi was arrested in July 2012 only months after being released as part of a prisoner swap deal between the Israeli regime and the Palestinian resistance movement of Hamas.
Issawi has been on hunger strike to protest against his administrative detention, which is a sort of imprisonment without trial or charge that allows the Tel Aviv regime to incarcerate Palestinians for up to six months. The detention order can be renewed for indefinite periods of time.
Earlier this month, Maisarah Abu Hamdiah, another Palestinian detainee, also died in an Israeli jail, triggering protests.
Palestinian prisoners in Israeli jails have been subject to human rights violations such as the use of torture during interrogations by prison authorities.
Arafat Jaradat, 30, who was arrested on February 18 on suspicion that he was involved in hurling stones at Israeli troopers, died days later in Israel’s Magiddo prison. The Israeli regime claims that Jaradat died of cardiac arrest, a claim Palestinians deny.
According to Palestinian sources, over 4,500 Palestinian prisoners are held in Israeli prisons, many of them without charge or trial.