Greece will not engage in any military operations in the Strait of Hormuz, Greek government spokesman Pavlos Marinakis said on Monday.

Greece would only participated in the EU’s naval mission “Aspides” charged with protecting ships in the Red Sea, Marinakis told a press conference.

U.S. President Donald Trump said on Sunday his administration was talking to seven countries about helping to secure the Strait of Hormuz amid the U.S.-Israeli war on Iran, calling on them to help protect ships in the vital waterway that Tehran has mostly blocked to oil tanker traffic.

Spain will also not take part in any military mission in the Strait of Hormuz because it considers the U.S.-Israeli war on Iran to be illegal, Madrid’s defence and foreign affairs ministers said on Monday.

The leftist coalition government led by Prime Minister Pedro Sanchez has criticised the offensive and banned participating U.S. aircraft from using jointly operated bases in southern Spain.

Defence Minister Margarita Robles rejected a demand by U.S. President Donald Trump for military support to secure the waterway – which Tehran has de facto blocked to oil tanker traffic – and his threats of a “very bad future” for NATO allies failing to do so.

“Spain will never accept any stopgap measures, because the objective must be for the war to end, and for it to end now,” Robles said.

The situation in the strait is a matter of grave concern for Europeans, but the European Union’s position should be that the war must end regardless of economic considerations, Foreign Minister Jose Manuel Albares said.

“We mustn’t do anything that would add even more tension or cause the situation to escalate further,” he told reporters in Brussels.

Some EU members such as Germany and Italy have also signalled they will not join military operations in the strait, while others including Denmark have yet to make a decision.