JERUSALEM - Even as US Middle East envoy George Mitchell was meeting Prime Minister Binyamin Netanyahu in Jerusalem to launch proximity peace talks, Palestinian Authority President Mahmoud Abbas warned that should the negotiations fail to focus on key issues, they could collapse within a few months.

Speaking after talks with Jordan's King Abdullah on Wednesday afternoon, Abbas gave the talks four months, saying after that, he would seek advice from the Arab League on the next steps.

Abbas said the talks must focus on core issues, such as the final borders of a future Palestinian state.

Speaking to CNN earlier Wednesday, Abbas called the Netanyahu government "extreme and uncooperative." The PA president added that "since they are an elected government, we have no choice but to work with them," but warned that he would halt negotiations should building in the West Bank continue.

The comments came as Abbas convened Fatah's Central Committee, which is expected to give Abbas permission to enter into proximity talks.

Also speaking Wednesday morning, National Infrastructures Minister Uzi Landau told Army Radio that the Palestinian side was already planning for the breakdown of the proximity talks.

"The Israeli government must make no more overtures to the Palestinians, they only embolden the other side and reduce the chances of reaching an agreement," he said.

Landau stressed that the Israeli people must decide the fate of Jerusalem among themselves, and once they have resolved it, should not be open to having discussions about it with other states.

“We do not discuss London with the British or Paris with the French, and neither should we discuss Jerusalem with them,” he said.

On Tuesday, the Knesset's Foreign Affairs and Defense Committee heard Brig.-Gen. Yossi Baidatz, head of Military Intelligence’s Research Division, also give a very bleak assessment of the Palestinian Authority's intentions, saying they were “already preparing the ground for the failure” of the proximity talks