North Korea has launched an "unidentified" missile eastward from Pyongyang.
"North Korea fired an unidentified missile eastward from the vicinity of Pyongyang this morning," the South Korean Joint Chiefs of Staff said, later addding that it reached an altitude of 770 kilometers and flew for 3,700 kilometers.
Japan's NHK broadcaster reported that the North seems to have fired the missile toward the northeastern region of its territory and strongly condemned the latest launch..
Late last month, the North fired a Hwasong-12 intermediate-range ballistic missile over the island nation.
South Korea and the United States are analyzing additional information.
The South's presidential office immediately called a National Security Council meeting, as the country's troops conducted a ballistic missile training in the East Sea in response.
Earlier Pyongyang's state agency threatened to use nuclear weapons to "sink" Japan and reduce the United States to "ashes and darkness" for supporting a U.N. Security Council resolution and sanctions over its last nuclear test.
The Korea Asia-Pacific Peace Committee also called for the breakup of the Security Council, which it called "a tool of evil" made up of "money-bribed" countries that move at the order of the United States.
"The four islands of the archipelago should be sunken into the sea by the nuclear bomb of Juche. Japan is no longer needed to exist near us," the committee said in a statement broadcast by the North's official KCNA news agency.
All this comes as the U.S. President Donald Trump announced that he would be visiting South Korea in November.
Trump has made clear he intends to keep all options open, including military ones, in dealing with Pyongyang.
"We'll probably all be going over as a group sometime in November," Trump told reporters aboard Air Force One, when asked if he will be visiting China. "And we'll be doing Japan, South Korea, possibly Vietnam with a conference."
It will be his first trip to Asia since taking office in January.