European leaders doubled down Thursday on refusing to join the United States and Israel military campaigns in the Middle East as they met in Brussels to grapple with rising oil and gas prices caused by the war.

European leaders have deflected entreaties from U.S. President Donald Trump to send military assets to secure the Strait of Hormuz, a key waterway for the global flow of oil, gas and fertilizer. However, rising energy prices because of the war and fears in Europe of a new refugee crisis have pushed leaders to make the Middle East a priority at the summit.