JERUSALEM — The Israeli military announced the suspension on Monday of a senior officer caught on videotape striking a Danish pro-Palestinian activist in the face with an M-16 rifle during a standoff between soldiers and participants in a bike tour organized to draw attention to the living conditions of Palestinian villagers in the West Bank.

Israeli leaders, from the prime minister on down, expressed shock and condemnation over the video, which was shown repeatedly on Sunday night on a popular Israeli television news program.

In a swift exercise of damage control hours after the video was broadcast, the military suspended the officer, Lt. Col. Shalom Eisner, from his post as deputy commander of the Jordan Valley Brigade and opened an investigation into the confrontation.

The clash took place on Saturday when Israeli soldiers blocked the path of some 200 Palestinians and their supporters who were cycling with flags and banners in the Israeli-controlled portion of the Jordan Valley. The bicycle tour was coordinated by a Palestinian youth organization with the participation of foreign activists from the International Solidarity Movement, a Palestinian-led organization that advocates nonviolent direct action against Israeli military rule in the occupied territories.