US has said that the missile blew up almost immediately after launch.
South Korea said on Sunday North Korea's latest missile launch threatened the entire world, warning of a punitive action if it leads to further provocations such as a nuclear test or a long-range missile launch.
"North Korea showing a variety of offensive missiles at yesterday's military parade and daring to fire a ballistic missile today is a show of force that threatens the whole world," South Korea's Foreign Ministry said in a statement.
Britain too has said it was "concerned" by reports that North Korea conducted a missile test on Sunday. The Foreign Office in London said it was "concerned by reports of a missile test by North Korea" and was "monitoring the situation closely".
Meanwhile a US military spokesman has said that he missile was launched near Sinpo, on its east coast, and it blew up almost immediately.
US Pacific Command detected and tracked what it assessed to be a North Korean ballistic missile launch at 11:21 am Hawaii time (2121 GMT) on Saturday, said US Navy Commander Dave Benham, a spokesman for US Pacific Command. "The missile blew up almost immediately," Benham said. "The type of missile is still being assessed."
This failed missile test occurred hours before US Vice President Mike Pence was due in South Korea for talks on the North's increasingly defiant arms programme.
North Korea's weapons of war rolled through Pyongyang on on Saturday and a senior figure in the regime said it could "beat down enemies with the power of nuclear justice", as leader Kim Jong-Un mounted a spectacular show of strength.
Ostensibly Saturday's event was to mark the 105th anniversary of the North's founder Kim Il-Sung's birth.
But it was also intended to send an unmistakable message to Washington about the isolated country's military might.
Tensions over North Korea's nuclear ambitions are stretched to the limit, with US President Donald Trump deploying an aircraft carrier battle group to the region.
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