Hong Yoongi was walking near South Korea’s Parliament building in Seoul when he spotted the interloper from North Korea.

       The trespasser on Thursday was a balloon that had floated dozens of miles across the inter-Korean border and the Han River in the South to land near the National Assembly complex. But the authorities were on the case, and on the scene. Some military personnel wore white protective gear, masks and gloves to deal with the trash that had scattered on impact.

       Over the past five days, North Korea has sent hundreds more drifting toward the South with payloads of trash like waste paper and used plastic bottles. This salvo follows a barrage of thousands of similar North Korean balloons earlier this summer. Pyongyang has said it was provoked by North Korean defectors in the South, who launched their own balloons carrying leaflets criticizing the North’s leader, Kim Jong-un, and USB sticks with K-pop music and K-dramas.

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