At around 4:30 PM on Tuesday, North Korea fired four short-range projectiles using a multiple rocket launcher into the East Sea, this according to Seoul's defense ministry.
These missiles have a range of about 150 kilometers.
Immediately following reports of the short-range projectile launches,the defense ministry announced that North Korea had already fired three short-range missiles into the East Sea earlier this morning, bringing the total of missiles launched on Tuesday to seven.
The ones fired in the morning flew about 55 kilometers.
Defense Ministry spokesperson Kim Min-seok labeled Tuesday's launches as explicit acts of aggression against the ongoing joint South Korea-U.S. military drills,.. adding that they are keeping a close watch on the possibility of additional provocations.
The North Korean regime fired four short-range missiles into its eastern waters last Thursday and then two Scud-C short range missiles on Monday.
The sharp rise in the number of launches comes as North Korea has been stepping up its rhetoric.
Pyongyang called out Washington earlier on Tuesday for deploying its nuclear-powered submarine to South Korea's southernmost port city of Busan as part of the joint military drills.
North Korea's main internet based propaganda website, Uriminzokkiri called the move a "provocation for a nuclear war against the communist country."
Yoo Li-an, Arirang News.