By Kwanwoo Jun 

SEOUL--South Korean military authorities are investigating a drone that crashed on an island near the disputed sea border with North Korea, the defense ministry in Seoul said on Tuesday.

A local resident found the drone on Baengnyeong Island in the Yellow Sea on Monday, when the two Koreas traded hundreds of rounds of artillery fire in the area, defense ministry spokesman Kwon Ki-hyeon said.

"The military authorities recovered parts of the drone for investigation, " he said.

He declined to give any further details, such as which country might have dispatched the drone.

South Korea's Yonhap News Agency, citing unnamed government sources, reported that the drone matched another one that Seoul suspects had been sent by North Korea before slamming into a hill north of the South Korean capital last month.

The report said the latest drone had a Japanese-made engine and various Chinese-made parts.

South Korea's defense ministry believes North Korea has deployed drones along the border with the South. The North has displayed drone-like aerial vehicles during its military parades and in March last year its state media reported dictator Kim Jong Un guided a drill of "super precision drones."

South Korea has been eager to bolster its own capabilities to spy on North Korea with reconnaissance drones. In March, Seoul confirmed an $817 million military procurement deal to secure Global Hawk unmanned aerial vehicles from Northrop Grumman Corp.

North Korea on Monday launched 500 rounds of artillery fire, 100 of which landed in South Korean waters across the sea border near Baengnyeong and other front-line islands. In response, South Korea fired about 300 rounds into North Korean waters.

North Korea doesn't recognize the sea border, which was drawn by United Nations forces after the 1950-1953 Korean War. In 2010, the North shelled nearby Yeonpyeong Island in the area, killing four people.

Write to Kwanwoo Jun at kwanwoo.jun@wsj.com

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