A spokesman for the anti-Muslim group responsible for unfurling an offensive banner at the MCG during an AFL game last night has published a video explaining its actions.

Members of the United Patriots Front (UPF) stretched a banner reading "Go Pies, stop the mosques" beneath a scoreboard at the Collingwood versus Richmond game.

An MCG spokesperson has told 9NEWS the banner breached the conditions of entry and was quickly removed by security staff. Those responsible were also evicted, and the AFL is investigating.

The banner was displayed at the MCG. (9NEWS)

A few hours after the game, UPF spokesman Blake Cottrell took to Facebook to voice his concern for the "future of Australia" and call for the removal of "places of worship and segregated communities for a foreign power which [don't] like us".

Mentioning the Lindt Cafe siege and the recent terrors attacks in Brussells, Mr Cottrell said the banner's message was not "unreasonable".

"You think i'm peddling fear? I'm concerned about the future of my country and I'm realistic about the people being brought into this country - that they aren't like us and never will be like us," Mr Cottrell said in the video.

The AFL has condemned the banner "in the strongest terms" and was investigating, it said in a statement.

"The AFL is aware that an offensive banner was displayed at the MCG during tonight's round two game between Richmond and Collingwood," a league spokesman said.

"Match-day security removed the banner when they became aware of it and evicted the patrons responsible.

"The AFL condemns the behaviour in the strongest terms and such actions have no place in society and not in our game."

Collingwood president Eddie McGuire has called for the people responsible to be banned from football for life.

"I hope the police got their names and numbers, if they've got anything to do with our club they'll be banned," he said.

Collingwood president Eddie McGuire.