North Korea has launched a series of short-range cruise missiles into the sea off its east coast, according to South Korea‘s military.

Fighter jets also fired several missiles in what appeared to be a military exercise on the eve of the 108th anniversary of the birth of North Korea’s founder, Kim Il-Sung, the late grandfather of current leader Kim Jong-un.

They may also be intended to “mark” South Korean elections due to take place on Wednesday.

South Korea’s Joint Chiefs of Staff said in a statement that the first series of projectiles — presumed to be cruise missiles — were fired from the North’s eastern Kangwon province on Tuesday morning before flying toward the country’s eastern sea.

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