This is the best summary I could come up with:

A key U.S. ally fired warning shots Friday — live ones to repel North Korean soldiers and a diplomatic volley to counter Russian President Vladimir Putin, as tensions rise after his new mutual defense pact with Kim Jong Un.

South Korea, which has so far only provided non-lethal aid to Ukraine, said it was considering arming Kyiv in response to a newly forged alliance between Moscow and Pyongyang reminiscent of the Cold War that has alarmed officials in the West.

That angered officials in Seoul, with national security advisor Chang Ho-Jin saying Thursday that “we plan to reconsider the issue of arms support to Ukraine.”

It’s against this diplomatic backdrop that North Korean soldiers crossed the border for the third time this month Friday “while working inside the demarcation zone,” according to Seoul’s Joint Chiefs of Staff.

While Seoul has described the crossings as unintentional, commercial satellite imagery obtained by NBC News showed a new wall-like barrier being erected in the past months along portions of the North Korean side of the demarcation zone (DMZ), which is a 2.5 miles thick buffer zone, half on each side of the border line.

Border tensions have been escalating for a while, with South Korea resuming aerial surveillance near the boundary and declaring null parts of the 2018 military accords.

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