South Korea and Japan said North Korea fired the projectiles from Wonsan, a city in the east of the country, on Sunday morning.
After flying approximately 230km (143 miles), the missiles landed in the waters between the Korean peninsula and Japan.
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South Korea’s military urged its neighbour to refrain from such military action, labelling the launches as “very inappropriate” at a time when the world is dealing with the coronavirus pandemic.
Japan’s defence ministry said in a statement that the presumed missiles were thought to have entered the sea outside of Japan’s exclusive economic zone.
Referring to these and other short-range projectiles Pyongyang has launched in the past few weeks, the statement added: “Recent repeated firings of ballistic missiles by NorthKorea is a serious problem to the entire international community including Japan.”
Experts think that these launches are an attempt to display leader Kim Jong-un’s control in the face of US sanctions and the Covid-19 pandemic.
Kim Dong-yub, an analyst at Seoul’s Institute for Far Eastern Studies, said the North Korean leader “wants to show he rules in a normal way amid the coronavirus (pandemic) and his latest weapons tests were aimed at rallying unity internally, not launching a threat externally”.
Pyongyang has so far denied that the country has any coronavirus cases but has acknowledged that the virus is a matter of “national existence”.
The country’s shortage of medical supplies and poor healthcare infrastructure make it particularly vulnerable to an epidemic.
Last week, President Donald Trump sent a letter to Kim Jong-un offering cooperation in the fight against the virus.