From the Guardian reporting
^^
A hospital spokesperson, Tawfiq al-Shobaki, said there was no exchange of fire during the raid but that the Israelis attacked doctors, nurses and hospital security. In security camera footage, one of the undercover agents can be seen searching a man against a wall with his hands above his head.
One of the men killed was apparently already paralyzed having been injured in an earlier Israeli attack in a cemetery which also killed a 15 year old boy.