Seoul, South Korea (CNN) North Korea has fired two unidentified short-range projectiles from an area near the coastal city of Wonsan into waters between the Korean Peninsula and Japan, South Korea's military said Monday.

The objects were fired at 12:37 p.m. Korea time and estimated to have a flight distance of 240 kilometers (149 miles) and altitude of 35 kilometers (22 miles), South Korea's Joint Chiefs of Staff said in a statement.

The projectiles are likely part of North Korea's combined military drills, the Joint Chiefs of Staff said.

The drills began on Friday, the one-year anniversary of leader Kim Jong Un's summit in Hanoi with US President Donald Trump that ended without a deal.

North Korean state media reported that Kim presided over the exercise, which was intended to "judge the mobility and the fire power strike ability of the defense units."

Read More