The missile was fired from the North Korean resort town at Wonsan at 5:40 p.m. (08:40 GMT) and flew northeast over the sea for about 200km (124 miles) before it appeared to make contact with land, Yonhap reported.
It comes just one week after the North reportedly launched additional short-range missiles in the direction of the Sea of Japan.
Just days prior to that launch, Pyongyang carried out a ballistic missile test, firing two rockets into the sea.
Both Russia and China have criticized North Korea, saying they do not recognize its nuclear ambitions, and that leader Kim Jong-Un should listen to the UN Security Council’s demands to return to the negotiation table.
However, both Moscow and Beijing agree that rising tensions on the Korean peninsula should not give the US a pretext to deploy a missile shield in the region.