Jerusalem ? Israel will push forward with plans to withdraw from some Palestinian areas and draw its own borders if a summit between Israeli and Palestinian leaders next week doesn’t revive a peace plan, an aide to Prime Minister Ariel Sharon said Saturday.

The Israeli and Palestinian leaders tentatively agreed to meet Tuesday if a final planning session goes well today.

Meanwhile Saturday, Israeli soldiers shot dead two Palestinian militants who were crawling through an off-limits zone toward a fence separating the Gaza Strip from Israel, the military said.

The men were armed with assault rifles, 10 grenades and a pipe bomb, and apparently planned to cross the fence to attack an Israeli farming village, the military said.

A long-delayed first summit between Sharon and Palestinian Prime Minister Ahmed Qureia will focus on jump-starting the U.S.-backed “road map” peace plan, stalled since it was launched last June. The plan aims to end more than three years of fighting and create a Palestinian state next year.

But neither side has met first-phase requirements under the plan, which was drawn up by the United States, the United Nations, the European Union and Russia.

The Palestinians have refused to crack down on militant groups that have killed more than 450 people in suicide bombings alone, in addition to staging numerous shooting attacks. And Israel has not gone ahead with troop pullbacks or frozen construction in Jewish settlements built on land in the West Bank and Gaza Strip that Palestinians want for their future country.

Amid the deadlock, Sharon has threatened to pursue unilateral moves to “disengage” from the Palestinians. Israel would pull troops and settlers out of nearly all of Gaza and perhaps also parts of the West Bank. Israel would then draw its own temporary border with the West Bank, but one that would leave the Palestinians with much less land than they seek.