Fans have criticised three Kansas City Chiefs players who protested during the US national anthem amid a day of national mourning for a mass shooting.
The demonstration at Monday’s game against the Washington Redskins came a day after a gunman killed 59 people and wounded hundreds in Las Vegas.
Fans held up signs such as one urging players, “protest on your own time”.
Some NFL players have been kneeling or sitting during the anthem to protest against racial inequality.
Cornerback Marcus Peters was the only player shown on TV seated as the anthem was played on Monday.
But his teammate Ukeme Eligwe sat, too, and Justin Houston knelt apparently in prayer.
Kansas City Star newspaper sports editor Jeff Rosen tweeted: “Man, can’t get behind Marcus Peters and Ukeme Eligwe sitting tonight.
“No sir. Not tonight.”