Lawmakers accused the Pentagon on Thursday of effectively undermining war crimes prosecution of Russia by blocking the sharing of U.S. military intelligence with the International Criminal Court at the Hague.

U.S. Senator Dick Durbin, a Democrat, said at Senate hearing that he had been told by the ICC’s chief prosecutor, Karim Khan, that the U.S. State Department and Justice Department were both cooperating. But the Defense Department, under the leadership of Defense Secretary Lloyd Austin, was refusing, Durbin added.

“Why are you reluctant to share the evidence that we have gathered in the United States through the Department of Defense for those who are holding Vladimir Putin accountable for his war crimes?” Durbin asked Austin, referring to the Russian president.