JERUSALEM (AP) — A Palestinian drive to ask the U.N. Security Council to endorse a state unilaterally, put forward by a top negotiator Sunday, appeared more an expression of frustration with U.S. and Israeli policies and stalled peace talks than a real effort to go it alone.

A resolution for a Palestinian state could face a veto from the U.S., Israel's main ally. But if the Security Council approved it, consequences could be even more severe.

Israeli Prime Minister Benjamin Netanyahu rejected the move, warning Israel would retaliate.

"There is no substitute for negotiations between Israel and the Palestinians," Netanyahu said in a speech at the Saban Forum in Jerusalem Sunday evening, saying he wanted a full peace agreement with them.

Then he warned, "Any unilateral action would only unravel the framework of agreements between us and can only lead to one-sided steps on the part of Israel."

He did not elaborate further, but an Israeli legal expert said if the Palestinians move ahead by themselves, Israel would be within its rights to cancel interim peace accords, which regulate daily life between the two sides.

The Palestinians are upset over continued expansion of Israeli settlements in the West Bank and east Jerusalem and are disappointed with the U.S. failure to put pressure on Israel to halt the construction. The lack of progress led Palestinian President Mahmoud Abbas to threaten to quit politics earlier this month.

As events unfolded, that, too, appeared to be an indirect appeal for international backing by Abbas, who enjoys considerable world support.

Abbas said he did note want to run in an election set in January. But last week, election officials postponed the vote indefinitely, saying that the militant Islamic Hamas' control of the Gaza Strip made it impossible to proceed. In the West Bank Sunday, officials in Abbas' Fatah Party said they would meet next month to extend his term indefinitely.

Chief Palestinian negotiator Saeb Erekat said frustrated Palestinians had decided to turn to the U.N. Security Council after 18 years of on-again, off-again negotiations with Israel.

"Now is our defining moment. We went into this peace process in order to achieve a two-state solution," he said. "The endgame is to tell the Israelis that now the international community has recognized the two-state solution on the '67 borders," referring to the cease-fire lines in effect before the 1967 war, when Israel captured territories from Jordan and Egypt that the Palestinians claim for their state.