A Palestinian political leader is on hunger strike to protest against his solitary confinement and mistreatment by Israeli prison authorities.

According to his lawyer, the leader of the Northern Branch of the Islamic Movement Sheikh Raed Salah refused all meals on Monday.

Israeli guards raided his prison cell and removed food and electrical devices and also confiscated his writing, which Salah has said are part of a book he is working on.

Back in October 2015, Salah was convicted of “inciting violence and terrorism” due to a sermon he delivered in a mosque in the occupied East Jerusalem in 2007.

He allegedly urged Muslims to protect Jerusalem’s al-Aqsa mosque from infiltrating Jewish settlers and Israeli parliamentarians.

Salah’s nine-month prison sentence began last May.

According to the Ma’an News Agency, he was placed in solitary confinement soon after his prison term began.

Israeli Prime Minister Benjamin Netanyahu banned Salah’s political party and shut down its offices and community operations after he was convicted.

An Israeli court rejected an appeal to end Salah’s isolation last month.

Also, Palestinian hunger striker, 20-year-old Anas Ibrahim Shahid, has been suffering memory loss and is at high risk of paralysis, according to the Palestinian Authority committee on prisoners’ affairs.

Shahid was arrested on 2 August during an attack on his house and has since been detained without charges.