North Korea fired two unidentified projectiles from the eastern coastal city of Wonsan on Monday, South Korea's defence ministry said.
"The military is monitoring for additional launches and maintaining readiness," said South Korea's Joint Chiefs of Staff.
They were unable to confirm how far the projectiles flew or whether it was ballistic or rocket artillery.
The launches come just days after North Korea's Kim Jong-Un oversaw military drills.
Russian ballistic missiles kill 12 in Ukraine's Kyiv
Russian ballistic missiles have killed 12 people and injured more than 30 in Kyiv early on Thursday, authorities said, damaging buildings and severing power supply to some parts of the Ukrainian capital.
Prince Harry and Meghan to move back to Britain
Prince Harry and his wife Meghan plan to move back to Britain this month, six years after they stepped down from their royal duties and relocated to the US, a source close to the couple said.
Kenya tourist helicopter crash kills seven
Seven people, including five Americans, were killed on Wednesday when the tourist helicopter they were flying in crashed in Kenya's Samburu county.
US, South Korea to cut length, scope of military drills after Trump order
South Korea and the United States will cut short annual joint military drills to five days from 11 and scale back some field training, the allies said on Wednesday, after President Donald Trump ordered a substantial reduction in US participation.
Central African Republic gold mine collapse kills at least 100
At least 100 people were killed when a low-tech artisanal gold mine collapsed in the Central African Republic on Tuesday, a senior official at a local mining association said.
