SEOUL, South Korea — North Korea says it successfully test fired what it described as newly developed long-range cruise missiles over the weekend, its first known testing activity in months, underscoring how it continues to expand its military capabilities amid a stalemate in nuclear negotiations with the United States.

The Korean Central News Agency said Monday the cruise missiles, which had been under development for two years, successfully hit targets 932 miles away during flight tests on Saturday and Sunday.

The North hailed its new missiles as a “strategic weapon of great significance” that meets leader Kim Jong Un's call to strengthen the country's military might, implying that they were being developed with an intent to arm them with nuclear warheads.