(Associated Press) KIM TONG-HYUNG August 6 2019 SEOUL South Korea North Korea continued to ramp up its weapons demonstrations by firing two presumed short-range ballistic missiles into the sea Tuesday while lashing out at the United States and South Korea for continuing military exercises that the North says could derail fragile nuclear diplomacy. North Koreas fourth round of weapons launches in less than two weeks came amid a standstill in nuclear negotiations and after President Donald Trump repeatedly dismissed the significance of the countrys recent tests despite the threat the weapons pose to allies South Korea and Japan and to U.S. bases there. Experts say Trumps downplaying of the Norths weapons display has allowed the country more room to advance its military capabilities as it attempts to build leverage ahead of negotiations which could possibly resume sometime after the end of the allies drills later this month. South Koreas military alerted reporters to the launches minutes before the Norths Foreign Ministry denounced Washington and Seoul over the start of their joint exercises on Monday. The ministrys statement said the drills which North Korea sees as an invasion rehearsal leave the country compelled to develop test and deploy the powerful physical means essential for national defense." The statement from an unidentified spokesperson said Pyongyang remains committed to dialogue but it could seek a new road" if the allies dont change their positions. It is too axiomatic that a constructive dialogue cannot be expected at a time when a simulated war practice targeted at the dialogue partner is being conducted" said the statement. We remain unchanged in our stand to resolve the issues through dialogue. But the dynamics of dialogue will be more invisible as long as the hostile military moves continue." Seouls Joint Chiefs of Staff said the two projectiles the North flew cross-country were likely short-range ballistic missiles. They were launched early Tuesday from an area near the Norths western coast and traveled about 450 kilometers (279 miles) on an apogee of 37 kilometers (23 miles) at a maximum speed of above Mach 6.9 before landing in waters off the countrys eastern coast the JCS said.