The shirtless supporters were standing in the Ukraine stands of Stade de Lyon as their side lost 2-0 to the home nation.
Eagle-eyed viewers spotted the two tattooed supporters in the crowd during the match on ITV.
But it is understood the decision to show the fans was not ITV’s – who broadcasted the match.
The footage was also beamed out internationally by American broadcaster ESPN.
Two men could be seen clearly showing off the swastika tattoos on their bodies – while others were stood with the group baring their chests.
But the fans may have had to put the tattoos away during the second half of the match – when huge hailstones halted play.
The swastika – in various forms – is a harrowing reminder of fascism and Hitler’s Nazi party.
The fans’ symbol – which is more complex than the typical Nazi swastika – appear to be Latvian ‘fire crosses’ and ‘thunder crosses’.
The symbols were typical in Latvian folklore long before the Nazis.
Ukraine is thought to have been the first region to use the swastika – in 10,000BC.
The symbol was also popular with ancient civilisations across what is now called Eastern Europe during the Bronze age.