A suspected North Korean drone spied on the site of a U.S. missile interceptor system in South Korea, Yonhap quoted military officials here as saying Tuesday.

The small unmanned aerial vehicle equipped with a Sony-made camera was discovered last week on a mountain near the heavily fortified inter-Korean border after it apparently crashed there.

The South's military collected it and analyzed the content of the 64-gigabyte memory chip.

"It was confirmed that (the craft) took photos of the THAAD site in Seongju," a South Korean defense official told reporters.

The distance between the border and the zone in North Gyeongsang Province is around 270 kilometers, he added.

Source: MENA