North Korea's foreign minister on Friday said the country's leadership will never again offer the U.S. major concessions without receiving anything in return, promising instead to focus on the development of a "national nuclear war deterrent" aimed at countering growing military tensions.

In a statement released to mark the two-year anniversary of DPRK leader Kim Jong Un's first summit with President Trump, Ri Son Gwon said that little had changed since that meeting and that relations between the two countries remained poor.