The court has more than 120 member states, though some countries, including France, have already said that they would not arrest him. Hungarian Prime Minister Viktor Orbán even said he would defy the warrant by inviting Netanyahu to Hungary.

It was not even clear if Netanyahu wanted to attend the event. The Polish Foreign Ministry said earlier Thursday that “it has not received any information so far indicating that Prime Minister Benjamin Netanyahu is going to attend the celebration of the 80th anniversary of the liberation of Auschwitz.”

“Poland is a safe country and any leader visiting Poland is entitled to protection granted by the Ministry of the Interior,” it added. The ministry also suggested that any idea that Netanyahu could be arrested in Poland is “fake news” that spread in U.S. media.

The commemoration will be attended by international officials and elderly survivors. It is to take place in Oswiecim, a town that was under German occupation during the war.

More than 1.1 million people were murdered at Auschwitz. Historians say that most of them, about a million, were Jewish, but the victims also included Poles, Roma, Soviet prisoners of war, and others.