White House press secretary Jen Psaki told reporters on Tuesday that the U.S. believes that Russia could carry out an attack on Ukraine “at any point,” underscoring the immediacy of the threat should Moscow decide to take action.

“Our view is this is an extremely dangerous situation. We’re now at a stage where Russia could at any point launch an attack in Ukraine,” Psaki told reporters at a briefing, adding later that her language was “more stark than we have been.”