Following emphatic assurances by President Barrack Obama, Saudi Arabia has expressed happiness knowing that the recent nuclear deal with Iran will not imperil the Gulf States.

Coming on the heels of talks between King Salman and the US President, Saudi Foreign Minister Adel al-Jubeir said his country was satisfied that the deal would contribute to security and stability in the Middle East.

King Salman's visit to the U.S.A is his first trip to the United States since assuming the throne in January.

The foreign minister said he hoped Iran would use the windfall from the lifting of sanctions for its own development rather than engage in what he termed as "nefarious activities in the region".

"The president explained and affirmed that the agreement prevents Iran from acquiring a nuclear weapon, has a robust and unprecedented inspections regime that includes inspections of all sites... and that has provision for snap back of sanctions should Iran violate the terms of their agreement," he added.

Gulf States fear that lifting sanctions could allow Iran to extend its support for militant groups and actions across the region they consider destabilising.

The Saudi foreign minister also said assurances had been given to President Obama that efforts would be made to relieve the humanitarian situation in Yemen.

The US has backed a Saudi-led coalition's attempts to restore the government in Yemen, in its campaign against Houthi rebels.

Human rights activists and humanitarian organisations have criticised Mr Obama's decision to support the coalition air campaign in Yemen, which has killed hundreds of civilians since March, and the naval blockade that has caused severe shortages of food, fuel and medicine.

Mr Obama pressed King Salman to ensure humanitarian organisations were given unrestricted access to Yemen, where the Saudis are leading a coalition against the Houthi rebel movement.

"We share concerns about Yemen and the need to restore a function government that is inclusive and that can relieve the humanitarian situation there," Mr Obama said after the meeting.