Vice President Joe Biden said today that “nothing has been taken off the table” when it comes to the U.S. response to an alleged plot by Iran to assassinate the Saudi Arabian ambassador to the U.S. and unleash deadly terrorist bombings in Washington, D.C.

“It is an outrageous act that the Iranians are going to have to be held accountable,” Biden told ABC News’ “Good Morning America”. “This is really over the top.”