A climate of fear pervades a hospital in the occupied West Bank city of Jenin, where patients and doctors are reeling from last month's deadly raid by Israeli agents disguised as medics.

At the rehabilitation ward at Jenin's Ibn Sina hospital, two patients recalled hearing the screams of a nurse as Israeli forces reached the third floor, AFP reported.

"I opened the door and saw a man. I didn't know they were special forces," said a patient, a grey hoodie pulled up over his head to conceal his face. "The man was choking the nurse with his hand and hit her with the butt of his gun."

His account matched that of an elderly patient, speaking to AFP while exercising along the corridor clutching a walking frame, who recalled hearing shouting while he stayed put in his room.

"It's toughest at night," said the patient, who had been shouted at by the undercover agents to shut his door during the assault.

A medic said he was approached by a man dressed as a doctor, who spoke perfect Arabic and showed the ID pinned to his chest before asking him to unlock room 376.

Inside were Basel Ghazawi, unable to walk after being shot in October, his brother Muhammad Ghazawi and friend Muhammad Jalamnah.

The Israeli military justified the killing inside a medical facility, which are granted special protection under international law, by claiming the trio were "terrorists" who were "hiding" in the hospital.

While Ibn Sina has continued to function, serving the Jenin area of the northern West Bank, there is palpable unease there. 

Tawfiq al-Shubaki, head of the surgery department, admitted the staff "feel scared" and a sense of "insecurity".