Top diplomats from the U.S., South Korea and Japan met in New York on Thursday and voiced “serious concern” over North Korea’s nuclear law that allows for preemptive nuclear strikes.

U.S. Secretary of State Antony Blinken, South Korean foreign minister Park Jin and Japanese foreign minister Hayashi Yoshimasa “expressed their serious concern over the DPRK’s escalatory and destabilizing messaging related to nuclear weapons use, including its adoption of a new law on nuclear policy,” according to a joint statement after their talks on the margins of the U.N General Assembly.