Crude oil prices rose Monday after a deadly attack on Saudi Arabia's airport in Riyadh, while Ukraine said Russia continued to attack its energy facilities.
Brent crude futures, the international benchmark, added 1.8% to close at $106.65 a barrel. U.S. West Texas Intermediate futures gained 2% to settle at $93.74.
Iran-backed Houthi militants in Yemen attacked King Khalid International Airport in Saudi Arabia's capital Riyadh on Saturday, leaving 12 people dead and more than 300 injured in a major escalation.
Meanwhile in Europe, Ukrainian President Volodymyr Zelenskyy said Monday that Russia violated the energy ceasefire declared by President Donald Trump. Moscow attacked a gas-production facility in Ukraine, Zelenskyy said.
Prospects of more Russian energy hitting markets after a deal with the U.S. have also risen. Trump said Friday that Moscow will supply more than 4 million tons of diesel to the global market under a deal he struck with Putin during a phone call.
Elsewhere early on Monday, the Saudi-led coalition fighting Yemen's Iran-backed Houthis said it was dealing with another round of drone and missile attacks directed at Saudi Arabia.
It comes after Iran's Minister of Foreign Affairs Abbas Araghchi made a phone call to Saudi Arabia's Minister of Foreign Affairs Faisal bin Farhan bin Abdullah to discuss the region's recent escalation of events as well as the efforts to address it, according to the Saudi state news agency,
In the U.S., about 1.2 million barrels per day of oil production in the Gulf of Mexico remained shut in Sunday due to Hurricane Isaias, according to the Bureau of Safety and Environmental Enforcement.