Manager Hong Myung-summoned his players on Monday to begin training for the 2014 World Cup in Brazil.
They gathered in Paju, Gyeonggi Province, after the final 23-man roster for next month's World Cup was announced last week and wore yellow ribbons in memory of the victims of the ferry disaster off the southwest coast on April 16.
Nine players including Ki Sung-yueng, Lee Chung-yong and Park Chu-young took part in training. Those who play in the German Bundesliga -- Hong Jeong-ho, Ji Dong-won, Koo Ja-cheol and Son Heung-min -- will join on Tuesday.
"Until May 19 the rest of the players will join the training camp in line with the schedules of their respective leagues," Hong said.