(CNN) North Korea has again fired projectiles into the sea, according to US and South Korean officials. The launch is North Korea's fifth in just over two weeks.

Two projectiles were fired early Saturday local time, a statement from South Korea's Joint Chief of Staff said. They were launched from the Hamhung area of North Korea and "the military is maintaining a readiness posture monitoring related trends in preparation for additional launches," the statement said.

A US official confirmed North Korea launched short-range ballistic missiles, and said that they appear to be similar to other recent launches.

The previous four rounds of launches by North Korea in recent days are believed to be short-range missile tests, which would violate of UN resolutions.

Earlier launches