Some National Football League players knelt again on Sunday when the U.S. national anthem was played before a game in London, defying U.S. President Donald Trump's renewed call to end their protest over racial injustice.

The Fox television network's broadcast of the day's first game, at Wembley Stadium, showed three members of the Miami Dolphins kneeling as U.S. music star Darius Rucker performed "The Star Spangled Banner."

All of the other uniformed Dolphins players and their opponents, the New Orleans Saints, were standing, many with their right hands over their chests.