The device was fired from the northern province of Jagang into waters off the east coast, according to the South's Joint Chiefs of Staff, and a Japanese defence ministry spokesman told AFP it "appears to be a ballistic missile".
uclear-armed North Korea fired what appeared to be a short-range missile into the sea on Tuesday, the South's military said, as Pyongyang's UN ambassador insisted it had an undeniable right to test its weapons.
The device was fired from the northern province of Jagang into waters off the east coast, according to the South's Joint Chiefs of Staff, and a Japanese defence ministry spokesman told AFP it "appears to be a ballistic missile".
Less than an hour later, Pyongyang's United Nations ambassador Kim Song told the UN General Assembly in New York: "Nobody can deny the right to self-defence for the DPRK", the North's official name.
It is the latest in a series of mixed messages from Pyongyang, coming days after leader Kim Jong Un's influential sister Kim Yo Jong, a key adviser to her brother, dangled the prospect of an inter-Korean summit.
But she insisted that "impartiality" and mutual respect would be required, calling for the South to "stop spouting an impudent remark".
She condemned as "double standards" South Korean and US criticism of the North's military developments, while the allies build up their own capacities.
In recent days, South Korean President Moon Jae-in, who has only months left in office, reiterated at the UN General Assembly his longstanding calls for a formal declaration of an end to the Korean War.
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