The chief pathologist who autopsied the body of Yahya Sinwar told CNN that the Hamas leader was killed by a gunshot wound to the head, Paralel.Az reports.

Dr. Chen Kugel, the chief pathologist at Israel’s National Center of Forensic Medicine in Tel Aviv, said that while Sinwar suffered other serious injuries — including from a tank shell or missile — he was confident a bullet to the head was what had killed the Hamas leader.

The Israeli military previously said that Sinwar was killed after a tank fired a shell into the building in which he had already been wounded and had not said anything about its troops firing a fatal gunshot.

“The cause of death is (a) gunshot wound in the head. He has a bullet in his head and there’s a severe traumatic brain injury,” Kugel, who signed Sinwar’s death certificate, told CNN in an interview.