An American activist from Oakland, California was critically injured Friday when Israeli soldiers fired a tear gas canister directly at his head during a weekly nonviolent protest against the wall in the West Bank village of N’alin. Thirty-seven-year-old Tristan Anderson is the fourth member of the International Solidarity Movement to be critically injured or killed by the Israeli military since 2003.

Jonathan Pollak of the ISM: “He was shot at directly with a tear gas projectile, with an extended range tear gas projectile from about fifty to sixty meters. And the impact caused several condensed fractures to his skull and collapsation of his eye socket. He was operated on in the hospital a few hours later in critical condition, and large portions of his frontal lobe had to be removed, because it was splattered with bone fragments as a result of the impact of the tear gas canister.”

During their weekly demonstrations since last April, four unarmed N’alin residents have been killed and over 400 injured by the Israeli Defense Forces.