US President Brack Obama called Zionist Prime Minister Benjamin Netanyahu after Iran reached an interim deal with world powers over its nuclear program.

US President Brack Obama called Zionist Prime Minister Benjamin Netanyahu after Iran reached an interim deal with world powers over its nuclear program.

The US leader told Netanyahu on Sunday he wanted to begin consultations “immediately”, as he reassured him that Washington will remain’ firm’ in its commitment to the Zionist entity.

“The two leaders reaffirmed their shared goal of preventing Iran from obtaining a nuclear weapon,” the White House said.

The Zionist entity was frustrated on Sunday with the nuclear deal. Netanyahu’s spokesman quoted him as saying that what was achieved in Geneva was not “a historic agreement but rather a historic mistake.”

“This is a bad agreement that gives Iran what it wanted, including the partial lifting of sanctions while maintaining an essential part of its nuclear program,” said a statement published by Netanyahu’s office.

The deal was announced on Sunday morning following four days of intensive talks between Iran and the five permanent members of the UN Security Council -- the US, Britain, China, France, Russia -- plus Germany.

Obama reassured Netanyahu that the United States “will remain firm in our commitment to Israel, which has good reason to be skeptical about Iran’s intentions.”

The two agreed to stay in close contact over the next six months as nuclear talks progressed.

The White House called the nuclear agreement an "initial, six-month step." Over the coming six months, Iran and the six powers will try to reach a final comprehensive deal.