SEOUL — A delegation of North Korean officials and ice hockey players crossed the heavily guarded border into South Korea on Thursday for joint Olympics training, as Pyongyang called for all Koreans to seek unification of the two nations. The group included 12 North Korean players who will form a combined women's ice hockey team with their southern counterparts at next month's Winter Olympics in the South Korean mountain resort of Pyeongchang. After going through South Korean checkpoints at the border, the team traveled to a national training centre in Jincheon, 90 km (56 miles) south of Seoul. Stepping off a bus, the athletes ignored questions as they were mobbed by throngs of media. They wore puffy winter jackets in the white, blue, and red colors of North Korea's flag, with DPR Korea emblazoned on the back, referring to the country's official name, the Democratic People's Republic of Korea. The athletes were met in Jincheon with flowers from their South Korean counterparts, as well as head coach Sarah Murray, who previously had called the government's decision to form a joint team a tough situation. Under an agreement worked out during the first official talks between the two Koreas in two years, the joint team will wear unity jerseys and march under a unified peninsula flag at the Games' opening ceremony on Feb. 9. South Korea has prepared all contingency scenarios in case North Korea makes any provacative moves during the Olympics, but the games remain an opportunity for peaceful engagement, South Korean foreign minister Kang Kyung-wha told Reuters in an interview on the sidelines of the World Economic Forum in Davos, Switzerland. We just need to make the best of it. Early on Thursday, North Korea sent a rare announcement addressed to all Koreans at home and abroad, saying they should make a breakthrough for unification without the help of other countries, its state media said. All Koreans should promote contact, travel, cooperation between North and South Korea while adding Pyongyang will smash all challenges against reunification of the Korean peninsula. In a separate statement on Thursday, North Korea advertised a new large scale tourist project in coastal Kangwon province, the same area where South Korean officials have agreed to hold joint athletic and cultural events around the Olympics. Some South Korean opposition politicians and conservatives have criticized Seoul's response to North Korea's participation in the games, saying Kim was using North Korea's involvement for his own purposes. Many other South Koreans welcomed the North's participation, but complained that the unified women's ice hockey team — the only such joint team to be formed — was unfair to the players. The controversy has sent South Korean President Moon Jae-in's overall approval rating below 60 percent for the first time since he took office in May last year, according to a survey released on Thursday by South Korean pollster Realmeter, dropping more than 6 percentage points since last week. The South Korean government has rejected criticism that the games had been hijacked by North Korea, saying the event will help defuse tensions over Pyongyang's nuclear and missile program. — Reuters