South Korea paid tribute to wartime Korean forced laborers at Japan’s Sado Island Gold Mines in a memorial ceremony on Monday, a day after boycotting a similar event organized by Japan, as tensions over historical atrocities continue to impact relations between the two sides.

SEOUL (Reuters) - South Korea expressed regret to Japan on Monday over Tokyo's attitude towards a memorial service held for labourers including Koreans forced to work in Japan's Sado mines during World War Two, Seoul's foreign ministry said.

Japan has held a memorial ceremony near the Sado Island Gold Mines despite a last-minute boycott of the event by South Korea that highlighted tensions between the neighbors over the brutal wartime use

After boycotting one organised by Tokyo, South Korea held its own memorial event on Monday for compatriots forced to work in a Japanese mine during World War Two, highlighting lingering sensitivities between the countries.

South Korea held a memorial event in Japan to honor laborers forced to work during WWII, boycotting a Japanese-organized event due to sensitivities over historical disputes. Improved ties between Seoul and Tokyo face challenges as both nations navigate diplomatic relations tied to colonial history.

By Jack Kim SEOUL (Reuters) -After boycotting a memorial event organised by Tokyo, South Korea held its own on Monday to remember compatriots forced to work in a Japanese mine during World War Two, highlighting lingering sensitivities between the key U.