A small plane pulling a banner stating “Stand And Respect Our Flag” flew over M&T Stadium as the Pittsburgh Steelers faced the Baltimore Ravens on Sunday.

The plane was reportedly flown by a man from Essex, Maryland, according to Fox 54 and Sports Illustrated.

https://twitter.com/KellyFox45/status/914498481905160193

The plane’s message came as both teams stood for the playing of the national anthem for the Week 4 game, though the Ravens drew boos for kneeling as a team purportedly in prayer after the song.

The message was likely spurred by last week’s game when the Steelers refused to take the field for the playing of the national anthem sparking fan criticism and ire.

Some fan were even seen on Youtube burning their Steelers gear.

The decision was further complicated when offensive tackle Alejandro Villanueva, a former Army Ranger, took the field, hand over heart, despite the team’s decision not to take the field.

Villanueva was later forced to apologize for “embarrassing” his team mates by standing for the anthem.

Follow Warner Todd Huston on Twitter @warnerthuston.