Magen David Adom emergency medical services said they were treating and evacuating four wounded men to hospitals in Jerusalem.

One was seriously wounded, while the others were in moderate condition, it added.

Police did not provide immediate details about the suspected gunman.

Israel has occupied the West Bank since the Six-Day War of 1967.

Since early last year, the territory has seen a string of attacks by Palestinians on Israeli targets, as well as violence by Israeli settlers against Palestinian communities.

Violence linked to the Israeli-Palestinian conflict has so far this year killed at least 203 Palestinians, 27 Israelis, one Ukrainian and one Italian, according to an AFP tally compiled from official sources on both sides.

They include, on the Palestinian side, combatants as well as civilians and, on the Israeli side, three members of the Arab minority.

Excluding Israeli-annexed east Jerusalem, the West Bank is home to nearly three million Palestinians, as well as around 490,000 Israelis who live in settlements considered illegal under international law.

* This story has been edited by Ahram Online.