North Korean leader Kim Jong Un convened a Politburo meeting Wednesday to discuss strengthening the country's military and "reconsidering" concessions made to the U.S. in response to "hostile" actions from Washington, according to state media.

The Politburo "instructed the field concerned to reconsider all the confidence-building measures previously and voluntarily taken by our state and rapidly examine the issue on resuming all actions which had been temporarily suspended," the Rodong Sinmun reported Thursday.