People watch a TV screen at a train station in Seoul, May 25, showing a news program reporting on North Korean missile launches, using file footage. North Korea launched three ballistic missiles toward the sea that day, hours after President Joe Biden wrapped up his trip to Asia where he reaffirmed the U.S. commitment to defend its allies in the face of the North's growing nuclear weapons threat. AP-Yonhap

North Korea fired eight short-range ballistic missiles (SRBMs) toward the East Sea, Sunday, a day after South Korea and the United States wrapped up a joint exercise near the peninsula involving a U.S. aircraft carrier, according to the South's military.

The Joint Chiefs of Staff (JCS) said the launches were detected between 9:08 a.m. and 9:43 a.m. from areas around Sunan in Pyongyang; Kaechon, north of the capital city; the northwestern region of Tongchang-ri; and the eastern city of Hamhung.

The missiles flew around 110 to 670 kilometers at altitudes of between 25 and 90 km with speeds of from Mach 3 to 6, it added.

The intelligence authorities of South Korea and the U.S. are conducting an analysis for more details, it said.

An informed source said two missiles were shot from each site "sporadically," presumably from transporter erector launchers (TELs), the largest number of ballistic missiles the North has recently launched "on a single day and occasion."

"The North's continued launch of ballistic missiles are provocations which poses a significant threat to peace and security not only on the Korean Peninsula but also in the world," the JCS said in a statement.