The nature of the altercation remains under investigation but some reports indicate that before he fell, Kessler was struck in the head with a megaphone by an individual with the pro-Palestinian event. He then fell and hit his head on the ground, according to the sheriff's office. It is believed Kessler was involved in an altercation with pro-Palestinian demonstrators when he was injured. There were two competing rallies near Westlake and Thousand Oaks boulevards in favor of the Israeli and Palestinian sides of the current conflict, according to the sheriff's office. Paul Kessler died as a result of injuries he sustained at the event Sunday, Ventura County Sheriff's Office investigators say. A Jewish man in his 60s died a day after he was injured in an altercation at a pro-Palestinian rally in Southern California, authorities say. A Jewish man in his 60s died after he was injured in an altercation at a pro-Palestinian rally in Thousand Oaks, authorities say.