North Korea has said it had found the remnants of a South Korean military drone and that any further "violation" of its territory would result in a "declaration of war." Tensions between the two sides of the peninsula have escalated since May when the North began flying balloons carrying garbage across the border to the South,

North Korea said Saturday it found the remains of a South Korean drone during a search in its capital, Pyongyang, claiming the drone proved the South’s military was behind the alleged drone infiltrations over the city’s skies earlier in the month.

South Korea’s spy agency said the direct military cooperation between Russia and North Korea has been confirmed with its new evidence.