U.S. Secretary of State Mike Pompeo told United Nations Security Council envoys on Friday that there needs to be “concrete actions” by North Korea before an easing of sanctions on Pyongyang can be discussed, said Dutch U.N. Ambassador Karel van Oosterom, Business Insider reported quoting Reuters.

“The secretary made very clear we need concrete deeds, concrete actions and only then we can start the discussion,” van Oosterom told reporters after Pompeo informally briefed envoys from the 15-member council, Japan and South Korea behind closed doors at the South Korea U.N. mission. 

It was not immediately clear if Pompeo elaborated on what “concrete actions.” Van Oosterom chairs the Security Council’s North Korea sanctions committee.