South Korea's defence ministry detected the dawn launch effort, which Japan condemned as an unacceptable and "provocative" act.
The ministry declined to speculate on the missile type, but military sources cited by local media said it was a powerful, medium-range "Musudan" that has already undergone three failed launches this year.
UN resolutions ban North Korea from any use of ballistic missile technology, although it regularly fires short-range missiles into the sea off its east coast.
"We believe that it was a failure," said Jeon Ha-Gyu, spokesman for the South Korean Joint Chiefs of Staff
"As to why and how it failed, we are in the process of analysing that," Jeon told a press briefing.
"We are maintaining a strong defence posture with potential further provocations by the North in mind," he added.
In April, the North failed three times to test fire a Musudan, which has an estimated range of anywhere between 2,500 and 4,000 kilometres.
"North Korea's repeated ballistic missile launches are serious, provocative acts against the international community, including Japan," Japanese Foreign Minister Fumio Kishida told a regular press briefing.
"We absolutely cannot accept this," Kishida said.
First unveiled as an indigenous missile at a military parade in Pyongyang in October 2010, the Musudan has never been successfully flight-tested.
The three failures in April were seen as an embarrassment for the Pyongyang leadership, coming ahead of a ruling party congress in May that was meant to celebrate the country's achievements.
"The explosion is presumed to have inflicted serious injuries on personnel in the immediate vicinity," Yonhap said.
During the party congress, North Korean leader Kim Jong-Un personally extended an offer of military dialogue with the South aimed at easing tensions.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
