North Korea has fired two short-range ballistic missiles into the East Sea, according to the South Korean military.

The South Korean Joint Chiefs of Staff said in a text message to reporters Wednesday night that it detected the launches from the Sunan area in Pyongyang between around 11:40 and 11:50 p.m.

The South Korean military is analyzing details of the projectiles, which flew about 360 kilometers before dropping into the sea.

This came as the South Korean and U.S. militaries were staging the annual Ulchi Freedom Shield exercise on the Korean Peninsula for the tenth day on Wednesday, with a combined air drill over the peninsula earlier in the day involving a U.S. B-1B strategic bomber. 

North Korea has long denounced the annual drills as rehearsal for an invasion.

The JCS criticized the North's move, which came on the heels of a failed launch of a space launch vehicle earlier this month, as a serious provocation that harms peace and stability not only on the Korean Peninsula but in the world as a whole, and denounced the launches as a clear violation of UN Security Council resolutions.

Noting that the South Korean military is currently conducting the combined annual Ulchi Freedom Shield(UFS) military drill with U.S. forces, the JCS said it will boost surveillance and vigilance efforts while maintaining a firm readiness posture in preparation for additional provocations.