Brent crude oil prices rise above $90 a barrel on Monday as U.S. and Iran exchange fresh strikes and shipping risks increase around the Middle East, with particular concern for flows through the Strait of Hormuz. Multiple outlets report Brent futures for September settlement trading around $90.19 to $90.79, also touching the highest level since June 11 and extending last week’s rally, when Brent gained about 15.9% (its biggest weekly rise since April). U.S. and Iran both take actions affecting maritime traffic: the U.S. says it enforces a naval blockade on Iranian ports, while Iran says it targets vessels that it says violate its navigation rules in the strait. Reports also cite disruptions to tanker traffic, including claims by Iran’s Islamic Revolutionary Guard Corps that two tankers were damaged after attempting to transit an unsafe route; Reuters is reported as unable to verify the incident. Shipping and monitoring sources report reduced transits through the Strait of Hormuz and additional vessels positioned to load oil. Analysts cited across outlets warn that markets may be underestimating potential impacts on inventories if the “dual blockades” and attacks continue.