President Obama is withholding information from Congress about the cyberattacks that took place during the election, even as leaks from a forthcoming intelligence report trickle out, according to frustrated Senate Republicans.

Senate Foreign Relations Chairman Bob Corker complained that FBI and national intelligence officials “were told not to come” to his classified hearing on Thursday regarding cyberattacks and the harassment of U.S. diplomats. Instead, the administration furnished witnesses from the State Department and the Treasury Department. Separately, media outlets reported Thursday night that the CIA has identified the Russians who provided the stolen Democratic emails to WikiLeaks, which released the messages during the fall election.