Oil prices moved higher on Monday, reaching their strongest levels in more than a month as tensions in the Middle East added fresh pressure to global energy markets. Brent crude climbed above $90 a barrel, reflecting growing concern about the impact of regional conflict on supply flows.

The latest gains came as escalating hostilities involving the United States and Iran disrupted oil shipments through the Strait of Hormuz, a critical route for global crude exports. Any restrictions in that corridor can quickly raise fears of tighter supply and push benchmark prices upward.

Market attention remained focused on whether the conflict could further interfere with the movement of oil from the region. Traders often react sharply to signs of disruption in the Middle East because the area plays a central role in world energy production and transport.

With Brent extending its advance, the oil market is now pricing in a higher risk premium tied to geopolitical instability. The move highlights how quickly supply concerns in the Gulf can ripple through global crude prices.