North Korean leader Kim Jong Un provides guidance on a nuclear weapons program in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang September 3, 2017. KCNA via REUTERS

SEOUL (Reuters) - An earthquake 5.6 was recorded on Sunday in North Korea near the country’s known nuclear test site Punggye-ri, Yonhap news agency reported, citing South Korea’s meteorological agency.

The quake appeared to have been man-made, Yonhap quoted the agency as saying, suggesting the isolated country had conducted a sixth nuclear test.