The 28-year-old, Mustafa Tamimi, was hurling rocks at the military vehicle on Friday in the West Bank village of Nabi Saleh when a soldier inside opened the rear door and fired at him from just a few yards away, witnesses said. He was taken to an Israeli hospital, where he died of his injuries Saturday.

The army's use of the gas canisters has come under sharp criticism in the past few years. Military officials say they are using the gas to quell violent demonstrations. The canisters, which emit choking, acrid smoke, are meant to push back crowds. But some Israeli troops have fired them directly at demonstrators, causing severe injuries and death.

Tensions also simmered along Israel's border with the Gaza Strip, where mourners buried a 12-year-old Palestinian killed in an Israeli airstrike on Friday. Palestinian fighters there fired two rockets at Israel.

Tamimi is the 20th person to be killed over the past eight years at similar demonstrations in rural villages throughout the West Bank, said Sarit Michaeli of the Israeli rights group B'Tselem. The weekly demonstrations are in protest over the construction of Jewish settlements and a separation barrier that eats up Palestinian farm land along parts of its route.

Photographs taken by a Israel activist Haim Schwarczenberg show Tamimi rushing after an armored military vehicle. The photographer says he was throwing rocks. He then crumples to the ground a few steps from the vehicle. His friends rush to help, covering his bloodied face with a black-and-white Palestinian checkered scarf.