More than 800 officials in the United States, the United Kingdom and the European Union released a public letter of dissent on Friday against their governments’ support of Israel in its war in Gaza.

The letter is the first instance of officials in allied nations across the Atlantic coming together to openly criticize their governments over the war, say current and former officials who are organizing or supporting the effort, according to the New York Times. 

The officials say that it is their duty as civil servants to help improve policy and to work in their nations’ interests, and that they are speaking up because they believe their governments need to change direction on the war. The signers say they have raised concerns through internal channels but have been ignored.

“Our governments’ current policies weaken their moral standing and undermine their ability to stand up for freedom, justice and human rights globally,” the letter says. 

It adds, “There is a plausible risk that our governments’ policies are contributing to grave violations of international humanitarian law, war crimes and even ethnic cleansing or genocide.”