The North Korea women's football team staged a protest ahead of their Olympic match in Scotland after a flag blunder.
The South Korean flag was shown by mistake on the big screen inside Hampden Park stadium as the players warmed up to play Colombia.
As a result, the North Koreans refused to play the match at the scheduled 7.45pm start time, and kick-off was delayed for more than an hour.
Their team walked off the pitch but were persuaded to return when the sides were announced again with each player's face displayed next to the North Korean flag.
A statement from Games organisers said: "Today, ahead of the women's football match at Hampden Park, the South Korean flag was shown on a big screen video package instead of the North Korean flag.
"Clearly this is a mistake. We will apologise to the team and the National Olympic Committee and steps will be taken to ensure this does not happen again."
The mistake occurred when a video package was being shown ahead of kick-off, with the North Koreans noticing that their faces were being pictured alongside the South Korean flag. The match eventually began at 8.50pm.
Spectator James Crossan told Sky News: "The players were out warming up at the time. Afterwards when they left the field... there was a long delay and no real information from the organisers or any of the officials over what the delay was caused by."
South Korea and North Korea exist as neighbours but have a far from harmonious relationship. The countries were formally established as separate entities in 1948, and the Korean War began in 1950.
Only two years ago, North Korean artillery shells killed four people, two from the military and two civilians, on Yeonpyeong Island in South Korea.