South Korea says it fired warning shots after Russian military planes entered its airspace.
Fighter jets were also scrambled in response.
According to the Defence Ministry in Seoul, it's the first time an aircraft from Moscow has violated the country's territorial sky.
It is planning to summon officials from the Russian Embassy to register formal protests.
Russian air strikes kill 10, injure more than 50 in Ukraine's Kyiv
Russian forces attacked the Ukrainian capital Kyiv on Thursday, killing at least 10 people and wounding more than 50, as drones and missiles struck residential buildings in what Russia said was a retaliation for recent attacks on its civil infrastructure.
Firefighters battle wildfire in southern France
Firefighters were battling to bring a wildfire in the Aude region of southern France under control on Thursday, as the country grappled with the lingering effects of Europe's recent heatwave.
US, Iran talks conclude in Doha, focused on Strait of Hormuz
Iran and the US concluded a round of indirect talks on Wednesday with no sign they had made headway toward a lasting peace, focusing instead on issues that they said had been resolved when an interim agreement was announced two weeks ago.
Trump honours Theodore Roosevelt in North Dakota, debuts new Air Force One
President Donald Trump dedicated a museum honouring Theodore Roosevelt on Wednesday, invoking the Republican president's legacy and linking it to his own vision for America ahead of the country's 250th anniversary.
Kenyan court charges 8 schoolgirls with fellow students' murder
A Kenyan court charged eight schoolgirls on Wednesday with murder for the deaths of 16 of their fellow students in a dormitory fire at a school in late May.
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