SEOUL, South Korea -- South Korea says it will not attend Sado mines memorial in Japan amid lingering historical tensions.

SADO, Japan (AP) — Japan is holding a memorial ceremony on Sunday near the Sado Island Gold Mines, which were listed this summer as a UNESCO World Heritage site after the country settled years of historical disputes with South Korea and reluctantly acknowledged the mines' dark history.

South Korea’s government said Saturday it will not attend a memorial service near Japan’s Sado Island Gold Mines due to unspecified disagreements with Tokyo over the event, which stirred longstanding tensions over the abuse of Korean forced laborers at the site before the end of World War II.

South Korea’s government says it has decided not to attend a memorial service near Japan’s Sado Island Gold Mines due to unspecified disagreements with Japan over the event, which stirred longstanding tensions over the abuse of Korean forced laborers a..