Israel has freed 150 Palestinians held during its military operations in Gaza, many of whom claimed they were abused during their captivity, Palestinian border officials said.

Those arrested, including two members of the Palestinian Red Crescent (PRCS) who had been held for 50 days, were released through Israel’s Kerem Shalom crossing in southern Gaza on Monday, border officials said.

Several were hospitalized after complaining of abuse and mistreatment in Israeli prisons. The Israeli military has denied the allegations.

“I went to prison with two legs and came back with one leg,” said Sufyan Abu Salah, from the hospital, adding that he had no medical history of chronic illnesses.

“I had inflammations in my leg and they (the Israelis) refused to take me to the hospital, a week later the inflammations spread and became gangrene. They took me to the hospital where I had the surgery,” Abu Salah said, adding that he had been beaten by his Israeli captors.

A resident of the town of Abassan east of Khan Yunis, 42-year-old Abu Salah, told Reuters he was arrested by Israeli forces in late February from a school where he and his family had taken refuge. The father of four said he had no idea where he was being held, but that it “looked like a camp, not a prison”.

The Israeli military told Reuters it was acting in accordance with Israeli and international law and those it arrested had access to food, water, medicine and proper clothing.

“The IDF is operating to restore security to the citizens of Israel, bring home the hostages and achieve the objectives of the war while operating in accordance with international law,” the military told Reuters, adding that specific allegations of misconduct are forwarded to the competent authorities for review.