North Korea condemned the U.S.' most recent round of sanctions in a statement on Sunday. It said if the U.S. doesn't turn down the heat on Pyongyang, it may never denuclearize.
The statement comes after news Monday that the U.S. would impose sanctions on three North Korean officials for abuses of human rights.
It represents a step backward for relations between the two countries. A summit between North Korean leader Kim Jong-un and President Donald Trump earlier this year led to hopes that Pyongyang would make moves toward denuclearization.
Planned talks between U.S. Secretary of State Mike Pompeo and an official from North Korea were canceled in November and have not been rescheduled.