South Korea says the two weapons North Korea fired on Thursday were a new type of ballistic missile.
South Korea's presidential office issued the assessment after a national security council meeting.
Seoul said earlier based on analysis of the launches that one missile flew 690 kilometers and the other 430 kilometers (270 miles) before landing in the waters off the east coast.
The presidential office says national security council members expressed "strong concerns" about the launches because they won't be helpful for an effort to ease military tensions on the Korean Peninsula.
South Korea says one of the two North Korean missiles flew 690 kilometers, longer than initially suspected.
South Korea earlier said both missiles flew about 430 kilometers before landing in the waters off the country's east coast on Thursday.
More From This Section
South Korea's military later said it and the United States had determined the second missile flew longer.
It says it still categorizes both missiles as short-range.
Disclaimer: No Business Standard Journalist was involved in creation of this content