"The recent drill conducted by our army is nothing more than part of the regular military training, and it has neither targeted anyone nor led to an aggravation of the situation in the region", an unidentified ministry spokesperson said in a statement to the official Korean Central News Agency. Following the collapse of the Trump-Kim meeting, North Korea had demanded South Korea to proceed with inter-Korean economic projects held back by USA -led sanctions against the North.
And in a potential indication of more launches to come, KCNA said that Kim "set forth important tasks for further increasing the strike ability of the defence units".
North Korea's officials said the testing of a new type of rocket is a part of standard military defensive drills.
The JCS added the missiles flew eastwards for 270 and 420 kilometres (170 and 260 miles) and the South Korean and United States militaries were jointly analysing them.
"If we only look on the range, then 420 km - this may be Scud C, and 270 km - Scud B. But considering that both had an altitude of 50 km, it is rather doubtful that Scuds would be launched at a low angle".
North Korea has fired two suspected short-range missiles from the west of the country, according to reports.
While Saturday's missile was sacked from a transporter erector launcher (TEL) vehicle with wheels, Thursday's test featured a tracked vehicle.
As North Korea conducted another rocket launch after the discussions, Moon said, the government needs public consensus on the food aid issue.
The official said Friday that the US and South Korean militaries share the assessment and are jointly analyzing more details from the launch.
The tests come just months after a failed second summit in February in Hanoi between the North's leader, Kim Jong-un, and Donald Trump, the USA president.
Choi Hyun-soo, a spokesperson from ROK's defense ministry, said at a regular press briefing that the ministry was deeply anxious about the DPRK's projectile launches, which violate the spirit of the inter-Korean comprehensive military agreement.
In a statement Thursday, Pentagon spokesman Lt. Col. Dave Eastburn said the North "flight-tested multiple ballistic missiles" and they flew to distances "in excess of 300 km before impacting in the ocean".
There was no immediate comment from North Korea or the United States.
South Korean and USA officials have described what North Korea fired Saturday as "projectiles", a broader term that include both missiles and artillery pieces.
Ending a pause in ballistic missile launches that began in late 2017, and alarming North Korea's neighbors, Kim personally supervised the launch of the first missile from the country's east coast on Saturday and two more from the west on Thursday.
Officials from the United States - including Special Representative for North Korea Stephen Biegun - and Japan are in South Korea to discuss ways to resume stalled denuclearisation talks with Pyongyang.
Missile tests could jeopardise the ongoing diplomacy if they violate UN Security Council bans on ballistic technology.
The latest launches were the country's first since November 2017, when North Korea last tested a ballistic missile. I know they want to negotiate, they're talking about negotiating.
According to the defense ministry report submitted to the chief of the parliamentary defense committee, DPRK's projectile launches over the weekend were seen as a live-fire exercise, rather than a provocation.