Pyongyang released a South Korean citizen detained in July after crossing the border into the North, the South’s Unification Ministry said on Tuesday. The prisoner was a 34-year-old man surnamed Seo who was detained after “illegally” entering North Korea last month, according to the ministry. South Korean officials have pressed for the return of six other South Koreans believed to have been held for years in North Korea, Reuters reported. In May, North Korea released three American prisoners in a gesture seen as clearing the way for June’s summit between North Korean leader Kim Jong-un and US President Donald Trump.