During a visit by US Secretary of State Mike Pompeo, Saudi King Salman bin Abdul Aziz and Crown Prince Mohammed bin Salman are expected to meet in Jeddah before heading to the UAE, US officials said.
Saudis and Emiratis support the firm stance which is adopted by the administration of US President Donald Trump on Iran
Commenting on his visit to Saudi Arabia and the UAE, Pompeo said before leaving Washington, "We will discuss with them how to prove that we are all in a strategic line and how to establish an International Coalition." He described the two Gulf states as "big allies in the challenge posed by Iran."
Pompeo said his country is seeking to form a coalition "not only across the Gulf, but in Asia and Europe, understands this challenge and is ready to confront the world's largest state sponsor of terrorism."
Tensions have risen further in the Gulf after Iran on Thursday dropped a US military drone, Tehran says has penetrated its airspace while Washington denies it.
In response to the downing of the US aircraft, Washington prepared a military strike against Iranian targets, but US President Donald Trump canceled it at the last minute as "disproportionate."
The dropping of US drone came after the attack on oil tankers in the Gulf region, Washington accused Tehran in carrying out it, while the Islamic Republic denied any involvement in them.