Citing prisoner affidavits, B'Tselem spokeswoman Sarit Michaeli said physical mistreatment has dropped sharply in recent years but has not disappeared.
Detainees have filed some 700 complaints about mistreatment by Shin Bet agents in the past decade, but none has led to a criminal investigation, she said.
In the West Bank, meanwhile, Palestinians protesting Jaradat’s death threw stones at Israeli troops in several locations Sunday, including the city of Hebron and at a checkpoint near the military’s Ofer prison.
In the clash near the checkpoint, troops fired live rounds, shooting the 15-year-old son of the commander of the Palestinian Preventive Security Service in the chest and stomach, said Palestinian health official Dr. Ahmed Bitawi. The teen, Walid Hab al-Reeh, was in stable condition, while another man was wounded in the arm, Bitawi said.
The Preventive Security Service is key to security coordination with Israel. The Israeli military said it was aware of a report that a Palestinian youth was seriously hurt by gunfire, but could not confirm that soldiers used live rounds to disperse the protest.
Kadoura Fares, who heads a Palestinian group advocating for prisoners, urged Palestinians on Sunday to keep demonstrating. He also said that one of the four hunger-striking prisoners, Jafar Izzeldeen, was moved to a hospital Sunday because his condition was deteriorating.
Recent West Bank protests have focused on the fate of prisoners, an emotional Palestinian consensus issue.
Tens of thousands of Palestinians have been imprisoned since Israel captured the West Bank, Gaza and east Jerusalem in 1967, meaning virtually every Palestinian family has had someone locked up.
The detainees are held on a range of charges, from stone-throwing to deadly attacks. Most Palestinians embrace them as heroes resisting occupation, while Israelis tend to view them as terrorists.
Associated Press writers Diaa Hadid, Aron Heller and Dalia Nammari in Jerusalem contributed to this report.