Palestinian President Mahmoud Abbas said he has asked the U.S. to settle a dispute with Israel over settlement expansion that is threatening to derail West Asia peace talks.

Israel’s 10-month partial freeze on new construction in West Bank settlements ends on September 26, and Israeli officials have indicated they will not extend the freeze as is. Mr. Abbas has said he’ll quit peace talks with Israel unless the restrictions remain in place.

Mr. Abbas said late Monday that he has asked the U.S. “to intervene in the settlement issue.”

The Obama administration has promised an active role in the talks, Mr. Abbas told reporters accompanying him on his way back from Washington, where direct negotiations were launched last week after a hiatus of nearly two years.

“The U.S. will be present at the negotiations, not necessarily behind closed doors, but (U.S. mediators) can be inside the room, or outside,” Mr. Abbas said.

Settlements take up land the Palestinians want for a state, and Mr. Abbas views Israeli Prime Minister Benjamin Netanyahu’s decision on the freeze as a test of his intentions.

President Barack Obama wants Mr. Abbas and Mr. Netanyahu to agree on the main principles of a peace deal within a year, but gaps remain wide. In Washington, Mr. Netanyahu — who long opposed Palestinian statehood before accepting the idea last year — struck a conciliatory tone, but the Palestinians still fear the Israeli leader plans to use the talks to buy time and establish more facts on the ground.

“Some say he is not serious and practicing PR,” Palestinian negotiator Nabil Shaath told reporters on Tuesday, referring to Mr. Netanyahu. “But we are going to test him on two imminent issues — the settlement slowdown and then at the negotiating table.”

Mr. Abbas and Mr. Netanyahu will meet twice next week, first in the Egyptian resort of Sharm el-Sheik and then in Jerusalem. U.S. Secretary of State Hillary Rodham Clinton will attend the Jerusalem meeting.

The Israelis are negotiating with Mr. Abbas, who has limited governing power in the West Bank under Israel’s overall security control. The Gaza Strip, located on the other side of Israel, is controlled by Mr. Abbas’ rivals, the Hamas, who do not recognise Israel and reject negotiations. Clashes and rocket fire are common along the Gaza-Israel border.

On Tuesday, Palestinian militants in Gaza fired a rocket into Israel. No one was hurt.

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