The family of the most prominent Palestinian prisoner, Marwan Barghouti, says that he has again been subjected to physical violence behind bars in Israel.

Arab Barghouti told the BBC he was shocked and appalled to hear from his father's Israeli lawyer that he had been assaulted three times by Israeli prison guards in the past month.

The Israeli Prison Service (IPS) said that the allegations made are false and baseless.

Marwan Barghouti was convicted by an Israeli court of planning deadly attacks against Israeli civilians and is currently serving five life sentences plus 40 years.

He was arrested exactly 24 years ago, at the height of the Palestinians' second intifada, or uprising. He had set up the Tanzim, an armed wing of the Fatah political faction.

Opinion polls indicate that despite his imprisonment, Barghouti is the most popular Palestinian leader. He remains a member of the Fatah Central Committee.

Many Palestinians view the 66-year-old as their equivalent of South Africa's Nelson Mandela and point to his ability to unite different political factions and his past rapport with Israeli leaders.

Arab Barghouti argued that his father's prominence had led to him being singled out for attacks and abuse.

He's someone who represents hope for unity, for democratic renewal, for a better future for the Palestinian people, he said. He's a target because he gives hope to the Palestinian people.

The Israeli lawyer, Ben Marmarelli, visited Marwan Barghouti in prison on Sunday and reported several instances of alleged abuse. He stated that Barghouti was severely beaten and left bleeding without immediate medical care, raising alarm over conditions for Palestinian prisoners.

Since the escalation of violence after the deadly Hamas-led attacks on Israel on October 7, 2023, there has been a noted increase in reports of abuse of Palestinian detainees, including allegations of routine beatings and severe medical negligence.

The IPS has consistently denied these claims, asserting that they investigate any allegations of misconduct within their facilities.

There are currently approximately 9,560 Palestinians classified as security prisoners in Israeli prisons, with Barghouti one of the most significant figures among them.