(CNN) North Korea fired two short-range missiles Saturday in the direction of the Sea of Japan, also known as the East Sea, according to an assessment cited by two US officials.

North Korea has been launching short-range ballistic missiles regularly in recent weeks. Saturday's launches were about 15 minutes apart.

One week ago, the country fired two short-range ballistic missiles into the waters off its east coast, just minutes before Pyongyang vowed to cut off dialogue with Seoul and referred to South Korean President Moon Jae-in as an "impudent guy."

South Korea's presidential Blue House said a National Security Council meeting will be convened.

"Regarding North Korea's launch of projectiles and the National Security Council meeting led by the chief Chung Eui-yong will be held from 7:30p ET (8:30 a.m. Local time)," a Blue House official said.

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