The seizing of the ship is part of ongoing efforts to implement U.N. Security Council resolutions on North Korea.
Both President Donald Trump and North Korean supreme leader Kim Jong Un garnered global criticism for their infamous tempers.
South Korean authorities believed the vessel made a ship-to-ship transfer of 600 tons of oil products to a North Korean tanker.
The drills come as the two allies clash over the controversial “comfort women” deal.
Under South Korean law, North Korean defectors can receive support from Seoul’s government to resettle in the country.
Seoul’s unification ministry conducted check-ups on 30 North Koreans who left before January 2016.
The discovery raises concerns over North Korea’s biological weapons production.
North Korea conducted a series of missile tests in 2017.
Ri recently appeared with Kim on a happy tour of a cosmetics factory in Pyongyang.
South Korea's dronebots will be operated by a team targeting North Korea’s nuclear and missile sites.
Pyongyang is conducting tests to see if anthrax germs can survive at temperatures of 7,000 degrees or more.
Ultimately, President Jae-in believes that any possible stalemate rests upon Kim Jong Un.
More than 400 marines have been doing training activities together, including shirtless wrestling in the snow.
North Korea's per capita incomes rose 5 percent despite sanctions over its nuclear weapons development program.
China said it was conducting routine exercises.
The anti-terror drill scenarios included tackling someone hijacking a bus full of athletes and attempting to ram it into the stadium.
Japan said Moscow had “big clout” with North Korea and asked Russia to cooperate.
Aegis destroyer vessels are conducting a two-day exercise in South Korean and Japanese waters.
The practice sessions come after North Korea slammed Trump as a “mentally deranged dotard" on Saturday.
North Korea cited international agreements that define aggression, arguing U.S. attempts to institute a naval blockade were illegal.
The long-anticipated unit was officially formed on December 1 and includes 1,000 soldiers.
The aircraft left its base in the U.S. territory of Guam before joining two Japanese F-15 fighters to take part in the drills.
The drones will be used for surveillance and will also be ready to mobilize to launch attacks.
A new report showed Yemen's Iran-friendly Houthi movement evaded the U.S. anti-missile system protecting troops from North Korea.
Teams from both nations are set to participate in a tournament in China later this month.