Israeli troops in the West Bank shot dead a Palestinian man and gravely wounded another on Sunday during a violent protest against Israel's air campaign against Gaza militants, the army and a Palestinian medic said. The medic, Basem Abu Sheikh, said 22-year-old Arafat Khawaja was hit in the chest by live fire in the village of Naalin, near Ramallah. Residents said some demonstrators were hurling rocks at Israeli forces, but it was not immediately clear if the dead man had been among them. Abu Sheikh and the Israeli military said another man was also shot during the protest and was in critical condition. The military said troops stationed near the village were attacked with a hail of rocks and only used live ammunition after other crowd control methods failed to halt the barrage. A spokesman said the incident was being investigated by military authorities.