Seoul, May 15 : South Korea and the US on Monday started joint regular identification work on possible remains of American soldiers killed during the 1950-53 Korean War, Seoul's Defence Ministry said. The two-day examinations on the remains suspected to be those of four American soldiers got underway between officials from the ministry's war remains excavation team and the US Defense POW/MIA Accounting Agency (DPAA) at the team's office in southern Seoul, reports Yonhap News Agency. DPAA Laboratory Director John Byrd joined this week's examinations that will focus on analysing the age, race and the cause of death of the remains based on combat records and other reports, according to the Ministry. One set of the remains was found at a former battle site, Arrowhead Ridge, in the border county of Cheorwon, 85 km northeast of Seoul, in May 2021, while the rest in the western city of Seosan, about 100 km southwest of the capital, in March this year. Based on earlier DNA analysis by the Ministry's team, the remains discovered at Arrowhead Ridge have been determined as that of someone of European descent. "On the occasion of the 70th anniversary of the South Korea-US alliance, we will further strengthen mutual exchange and cooperation, and continue efforts to find those who are still missing until the end," Lee Keun-won, head of the Ministry's team, was quoted as saying. The two sides have conducted such joint analysis work two to four times every year since the founding of the Ministry's team in 2007. /IANS