South Korea was "confirming facts" after one of its young athletes was accused of shining a laser pen into the face of Chinese Premier Li Keqiang.
Clapping and chanting, more than 60,000 spectators and over 3,000 athletes braved rain as magnificent fireworks lit the sky above the Nanjing Olympic Sports Center Stadium, marking the end of the 13-day 2014 Youth Olympic Games.
Chinese Premier Li Keqiang attends the closing ceremony of the second Summer Youth Olympic Games, in Nanjing.
"The Nanjing Olympic Games will come to a close and the flame will be extinguished today, but the flame that ignited the volunteering spirit in your heart will never be extinguished," Li said.
Premier Li attended the closing ceremony of the Games Thursday in Nanjing and visited the volunteers of the Games.
"We have seen an excellent organisation during this Youth Olympic Games from transport to communication to venue management." IOC President Bach said.
The mixed team relay at the Nanjing Youth Olympic Games demonstrated on Tuesday how sport can transcend differences, bring people together and turn strangers into friends.
Students of major martial arts school endure tough training for high-wire act at Youth Olympics show.
Who can make the world sports stars after the Nanjing Youth Olympic Games (YOG), which is staged for athletes aged 15-18 from around the world? Who can be the future Olympic champions?
The Nanjing 2014 Youth Olympic Games will inspire athletes to achieve higher goals, according to Young Ambassador and Olympian Monika Fasungova.
Jaws dropped when Yao Ming strolled across the main square of the Youth Olympic Village on Monday. The youth Olympians could not stop staring at the towering basketball legend, one of the best-known sportsmen in China.
The closing ceremony of the Youth Olympic Games will feature eight distinct parts and each will have a theme like "Five Continents' celebrations", "City of Youth" and "Tomorrow", said Chen Weiya, chief director of the opening and closing ceremonies.