RIYADH/WASHINGTON, May 30 (Newswires) – The U.S. government and Saudi King Salman have used tough rhetoric against Iran.

U.S. Secretary of State Mike Pompeo on Thursday blamed Iran for attacks this month on oil tankers in the Gulf, saying it was an effort by Tehran to raise the global price of oil.

"These were efforts by the Iranians to raise the price of crude oil throughout the world," Pompeo told reporters shortly before leaving for a trip to Europe. Earlier, White House National Security Adviser John Bolton said evidence that Iran was behind the attacks would be presented to the United Nations Security Council next week.

Saudi King Salman bin Abdulaziz Al Saud warned on Thursday that Iran's development of nuclear and ballistic missile capabilities would threaten regional and global security. He made the remarks at an emergency summit of Gulf Cooperation Council in Mecca on Thursday night that Tehran's actions threatened international maritime trade and global oil supplies in a "violation of UN treaties," Al Arabiya TV reported. "We will work together to face all challenges. The Iranian regime has been interfering in other countries' affairs, developing their nuclear programs and threatening international navigation," the king told the summit in an opening speech.

He added that Saudi Arabia is keen on the security and stability of the region, calling for Gulf, Arab and Islamic summits in Mecca to discuss global coordination for the best solutions to the regional tensions.