Pyongyang will have developed the ability to strike the United States with a nuclear-tipped intercontinental ballistic missile (ICBM) within months, CIA director Mike Pompeo said on Thursday.

Speaking at an event hosted by the Foundation for Defence of Democracies, Pompeo said that Washington should act on the assumption that North Korea’s nuclear program was close to completion.

“They are close enough now in their capabilities that from a U.S. policy perspective we ought to behave as if we are on the cusp of them achieving,” he said. “We are not out of time… But we are running out of time.”