In the most recent show of force, Pyongyang put its military might on display during a parade on April 15 marking the 105th birth anniversary of the country's founder Kim Il Sung, grandfather of present ruler Kim Jong Un.
South Korea Defense Ministry spokesman Kwon Ki-joon, said that "several projectiles" flew about 1,000 kilometers.
Earlier, United States Secretary of State Rex Tillerson urged the international community to increase pressure on North Korea, saying that failing to do so would bring 'catastrophic consequences'.
The United States has started deploying the first elements of its advanced Terminal High Altitude Area Defense anti-missile system at the Osan Air Base in South Korea after North Korea conducted test of four ballistic missiles which broke international sanctions.
The United States and South Korea will deploy the advanced THAAD missile defence system on the volatile Korean peninsula as a "defensive measure" to counter the growing security threat from North Korea's weapons of mass destruction. The move has not gone down well with China which said that the move will harm the security of countries in the region.
Deployment of THAAD in South Korea could unfold a new cataclysm in the Korean Peninsula with unwelcome prospects.
The India-Japan joint naval exercises are a strategic signal for China, observes Dr Rajaram Panda.
Will the unpredictable North Korean leader provoke conflict on the Korean peninsula?
'The world may be desirous of peace, but not Kim Jong-un.' 'Should we then accept the old adage that to maintain peace, we should be prepared for war?' asks Rajaram Panda.