Police and stewards were involved in a commotion with some Bayern Munich fans during their match against Arsenal on Wednesday night.
Footage posted on social media shows the disturbance in the early stages of the Champions League clash at the Emirates Stadium.
Arsenal against Bayern Munich.
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The start of Arsenal vs Bayern saw police and stewards deal with some away fansCredit: AFP
It took place at the bottom of the away end, where tens of Bayern fans stood.
However, it is not yet clear as to what caused the incident between officials and supporters.
talkSPORT.com have contacted the Metropolitan Police for more information.
Arsenal opened the scoring in the 22nd minute when Jurrien Timber headed in from a Bukayo Saka cross.
MORE ON THE CHAMPIONS LEAGUE
But Bayern equalised shortly after the hour-mark when 17-year-old Lennart Karl smashed in from inside the area.
He is the first player to score against Arsenal in a Champions League group stage/league phase match at the Emirates under Mikel Arteta.
Arsenal and Bayern are meeting in the Champions League for the second time in three seasons.
The German giants got the better of the north Londoners during the 2023/24 quarter-finals with a 3-2 aggregate win.
In this season's competition, Bayern are top of the league phase and ahead of Arsenal on goals scored as things stand.
They join Tottenham Hotspur as the only three sides who remain unbeaten in the Champions League.
The Emirates Stadium.
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It remains to be seen what caused security officials to go over to the away endCredit: Getty