Brent crude oil futures continued to rise on Monday. The major oil-producing countries are facing political uncertainty following the death of the Iranian president in a helicopter crash and the cancellation of the Saudi crown prince's trip to Japan due to the king's health issues. Brent crude oil for July delivery rose 0.4% to $84.08 a barrel, earlier hitting $84.44, the highest since May 10. U.S. West Texas Intermediate (WTI) crude oil futures for June rose 0.24% to $80.22 per barrel, earlier touching $80.35, the highest since May 1. The June contract expires on Tuesday, with the more actively traded July contract reaching a high of $79.95 per barrel and currently trading at $79.81 per barrel. On Monday, an Iranian official said that Iranian President Raisi and Foreign Minister Abdolrahim were killed when the helicopter they were traveling in crashed in the cold weather in the mountainous area. In addition, Japanese Chief Cabinet Secretary Yoshihide Suga said that Saudi Crown Prince Mohammed bin Salman has postponed his scheduled visit to Japan on Monday due to the health issues of Saudi King Salman. Saudi Press Agency (SPA) reported on Sunday that 88-year-old King Salman will receive treatment for a lung infection. "If King Salman's health is not good, then the uncertainty in the energy market has increased after the news of the Iranian president's disappearance this morning," said IG Markets analyst Tony Sycamore. ⑤ He added that after WTI rises above the 200-day moving average of $80.02, it may rebound further to $83.50. "I think there are enough reasons to believe that this situation will happen, especially considering the real estate measures announced by the major Asian countries last week." ⑦Brent crude oil rose by about 1% last week, marking the first weekly increase in three weeks; US crude oil rose by 2%, as economic indicators for the world's two largest oil-consuming countries, the US and China, showed some improvement. Despite the volatile situation in the region, oil prices only fluctuated slightly. ING, the Dutch international group, head of commodity strategy, Warren Patterson, said: "The oil market is still fluctuating within a range. Without any new catalytic factors, we may have to wait for the clarification of OPEC+ production policies to break through this range. The market seems to be increasingly numb to the development of geopolitical situations, which is likely due to OPEC's large amount of idle production capacity." The Organization of the Petroleum Exporting Countries (OPEC) and its allies are scheduled to hold a meeting on June 1st. The market and industry have become accustomed to the leadership position of Saudi Crown Prince Mohammed in the energy sector, regardless of whether or not there is this health issue, the continuity of Saudi Arabia's strategy can be expected.