Tensions are rising in the Middle East over  latest attacks on oil tankers.  USA is blaming Iran for  attacks on two tankers in  Gulf of Oman on Thursday. The tankers are owned by Japan and Norway. They were hit by blasts while navigating waters close to  strategically important Strait of Hormuz between Iran and  United Arab Emirates. Around  fifth of  world's oil passes through the Strait, which is just 68km at its narrowest point. U.S. Secretary of State Mike Pompeo said Iran was behind  "blatant assault" on the vessels. He said the U.S. would defend itself and its allies against "Iranian aggression" in  region. However, he provided no evidence that Iran was behind  attacks.
The attacks are  second such incidents carried out against tankers in  past month. Two Saudi tankers were sabotaged in  UAE port of Fujairah last month. The U.S. says the latest tankers were hit by mines and posted  video online of supposed Iranian forces removing  unexploded mine off  hull of one of  ships. Iran's Foreign Minister described the attacks as "suspicious". He said Iran's navy was investigating them. Iran called the U.S. accusations "unfounded," "inflammatory" and "Iranophobic". The Japanese owner of one of  tankers said his vessel was struck by some kind of missile and not by  mine. The United Nations cautioned that  truth needed to be "clearly established".