The Armenian international has not travelled with the Gunners for the match tonight over fears for his safety, due to his country’s ongoing political conflict with host nation Azerbaijan.
But fans still showed their support for the absent midfielder in Baku by wearing shirts with his name and number emblazoned across the back.
Footage has now emerged showing two cops tailing a pair of Gunners fans who are strolling along the street.
One then appears to tell a fan to stop and at that point, they move past the camera to reveal the name on the back of their shirt.
“No wonder Mkhitaryan didn’t feel safe going”
Viewer of clip
After several moments speaking to his colleagues, the policeman decides to let the duo walk away.
More than 3million people have seen the footage since it was posted to Twitter by sntv yesterday.
And fans were quick to voice their astonishment at the incident.
“I really want both teams to boycott the final,” one wrote.
Another commented: “This is so unacceptable, please let’s stay safe.”
And a third added: “No wonder Mkhitaryan didn’t feel safe going.”
Arsenal’s players have since revealed they have been inspired to win the Europa League for their absent team-mate.
Granit Xhaka said: “Of course, we’re disappointed he’s not here.
“But I think we’ve spoken a lot about Micki and politic things.
“It’s time to speak about football and be very good on the pitch.
“We want to give him the trophy when we get back.”
And defender Sokratis Papastathopoulos – who played with Mkhitaryan at Borussia Dortmund – said a win would be for him.