Palestinians shut down shops and transportation in the occupied lands Tuesday in a PLO-ordered general strike, and underground leaders of the uprising urged Arabs to step up civil disobedience against Israeli rule.

Israeli troops shot and wounded a 17-year-old Arab in the chest Tuesday during a clash in the West Bank city of Nablus, said an official at the city's Al Ittihad Hospital.An army spokesman said the soldiers opened fire after a group of youths hurled rocks at them from a rooftop in the city's marketplace. The hospital official identified the youth as Hatem Kilani.

The army demolished two homes belonging to Arabs suspected of staging firebomb attacks in the West Bank city of Bethlehem, Israel army radio and Arab witnesses said.