Crude oil prices extend gains for a fourth day, staying above $85 per barrel as tensions between the United States and Iran escalate. Multiple reports link the move to heightened concerns about disruption to oil shipments in the Middle East, particularly around key sea routes such as the Strait of Hormuz. The United States is reported to have reinstated naval restrictions associated with a blockade aimed at Iran, prompting further market worries about supply continuity. At the same time, reporting describes continued American strikes on Iranian missile and coastal defense positions, alongside broader US military action in the region. Other accounts add that the United Arab Emirates reports Iranian cruise missile attacks affecting oil tankers. Investors are reacting to the risk that shipping route security could deteriorate and that crude flows could face delays or interruptions. Analysts quoted across the coverage say further price increases depend on how the conflict develops, with traders monitoring the scale and direction of military and shipping incidents.