The latest launch came just four days after the North fired two projectiles believed to be the newly developed short-range ballistic missiles
known as KN-23 into the East Sea.
Seoul's 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 North's western coast and traveled about 279 miles on an apogee of 23 miles at a maximum speed of above Mach 6.9 before landing in waters off the country's eastern coast, the JCS said.
On July 25, North Korea fired two short-range ballistic missiles
that Seoul officials said flew 600 kilometers (370 miles) before landing in the sea.
The exchange of letters set the tone for continued diplomatic efforts between the two sides to resolve the stalemate over the North's denuclearization, in spite of Pyongyang's resumption of limited testing of short-range ballistic missiles
North Korea tested short-range ballistic missiles
on May 4 and 9, ending a pause in launches that began in late 2017.
Previously, the US Army's conventional short-range ballistic missiles
posed no threat to China, while the US Air Force's intercontinental ballistic missile and the US Navy's submarine-launched ballistic missiles both carried only nuclear warheads.
They had a range of around 70 to 240km and fell into the sea, it said, but further analysis was required on whether they were short-range ballistic missiles
. Similarly, US Secretary of State Mike Pompeo avoided calling them missiles, describing them as "short range" in TV interviews, and telling ABC it "didn't present a threat" to the United States, South Korea or Japan.
In the western coast, a short-range ballistic missiles
hit gatherings of mercenaries and the army targeted the mercenaries in L-Doryhmi causing dozens killed and injured among them.
The Experts Committee explained in a confidential report to the UN Security Council, according to the French Press Agency, that short-range ballistic missiles
, as well as other weapons, were sent from Iran to Yemen after the arms embargo was imposed in 2015.
These short-range ballistic missiles
carry the forge and aluminium press stampings of Iranian arms manufacturers, and have been transferred to the terrorists after the 2015 arms embargo.
THREE short-range ballistic missiles
have been fired by North Korea, according to the US military.
SEOUL, Jumada II 01, 1437, March 10, 2016, SPA -- North Korea fired two short-range ballistic missiles
into the sea off its east coast city of Wonsan early on Thursday, flying approximately 500 km (300 miles), South Korea's military said, according to Reuters.