The exercises will conclude on Wednesday, according to the outlet.
The drills come just two weeks after fresh North Korean ballistic missile tests. On March 6, North Korea launched four ballistic missiles, explaining a day later that the launches were a test of its ability to strike US military facilities located in Japan.
Last year, North Korea carried out two nuclear tests and over two dozen of test launches using ballistic missile technology. Previously, the United Nations imposed sanctions on North Korea for three nuclear tests it carried out in 2006, 2009 and 2013.
North Korea declared itself a nuclear power in 2005. The United States, Japan and South Korea, as well as Russia and China, took part in talks with North Korea on the denuclearization of the Korean peninsula between 2003 and 2009, when Pyongyang withdrew from the talks.
The annual US-South Korean Foal Eagle field training exercises are taking place simultaneously and are set to last until late April. The exercises are also aimed at deterring North Korean aggression. The move was criticized by Pyongyang, as it considers the exercises as a rehearsal for an invasion.
