North Korea fired off a total of 25 more short-range missiles toward eastern waters Sunday evening, local media reported.
The country launched 10 projectiles for 10 minutes from 6.20 p.m., before firing off eight projectiles for five minutes from 8.03 p.m. and seven more projectiles for four minutes from 9.28 p.m., Xinhua quoted citing the Joint Chiefs of Staff.
Those projectiles were believed to be short-range missiles, possibly the FROG surface-to-surface missiles, as they have a range of around 70 km, military officials said.
The latest launches came 12 days after Pyongyang fired off seven projectiles, possibly artillery shells fired from the North Korea's new multiple rocket launcher termed by the South Korean military as KN-09.
In what appeared to be a protest against the joint annual military exercises by South Korea and the US, North Korea fired off multiple short-range missiles and artillery shells from Feb 21 to March 4, which Seoul called as an armed protest and a show of force.
North Korea was known to have introduced the FROG missiles from the then Soviet Union from the 1960s. Those missiles were fired from Wonsan areas in the North Korea's southeastern coast toward the eastern open waters.