White House National Security Adviser John Bolton said on Thursday that there was some prospect that evidence Iran was behind attacks this month on oil tankers in the Gulf would be presented to the United Nations Security Council next week. "I don’t think anybody who is familiar with the situation in the region, whether they have examined the evidence or not, has come to any conclusion other than that these attacks were carried out by Iran or their surrogates," he said. The US military has sent forces, including an aircraft carrier and B-52 bombers, to the Middle East in a move that US officials said was made to counter "clear indications" of threats from Iran to American forces in the region. "I don’t think this threat is over, but I do think you can make at least a conditional claim that the quick response and the deployment and other steps that we took did serve as a deterrent," Bolton told reporters during a visit to London. Asked whether he was at odds with President Donald Trump, who said earlier this week that the US was not looking for regime change in Iran, he said: "The policy were pursuing is not a policy of regime change. Thats the fact and everybody should understand it that way." Meanwhile, US Special Representative for Iran Brian Hook said US actions taken so far in the Gulf region, which include repositioning military assets, have had the "desired deterrent effect on the (Iranian) regimes risk calculations". The United States will respond with military force if its interests are attacked by Iran, he said. Hook was speaking to reporters by phone ahead of emergency summits of Gulf and Arab leaders in Makkah on Thursday to discuss drone strikes on oil installations in Saudi Arabia and attacks on four vessels, including two Saudi oil tankers, off the UAE coast earlier this month.