North Korea fires two ballistic missiles. [Photo, AP]

North Korea early Friday fired an additional ballistic missile and 170 rounds of artillery shells toward the sea and flew warplanes near the tense border with South Korea, further raising animosities triggered by the North's recent barrage of weapons tests.

The North Korean moves suggest it is reviving an old playbook of stoking fears of war with provocative weapons tests before it seeks to win greater concessions from its rivals.

South Korea's Joint Chiefs of Staff said in a statement the short-range missile lifted off from the North's capital region at 1:49 a.m. Friday (1649 GMT Thursday; 12:49 p.m. EDT Thursday) and flew toward its eastern waters.

It was North Korea's 15th missile launch since it resumed its testing activities on Sept. 25. North Korea said Monday its recent missile tests were simulations of nuclear strikes on South Korean and U.S. targets in response to their "dangerous" military exercises involving a U.S. aircraft carrier.

After the latest missile test, North Korea fired 130 rounds of shells off its west coast and 40 rounds off its east coast. The shells fell inside maritime buffer zones the two Koreas established under a 2018 inter-Korean agreement on reducing tensions, thus violating the accord, South Korea's military said.