Some Eagles and Packers fans got into an all-out brawl in the stands at Lambeau Field on Thursday night ... and cops tell TMZ Sports some of the fighters were taken to jail.
At some point during the Philly-Green Bay game on "Thursday Night Football," fans in Eagles jerseys started wrestling with fans in Packers jerseys.
The brawl got pretty intense ... punches and kicks were thrown -- and bodies were dragged all over the bleachers.
Eventually, cops came in to break it up ... and a Green Bay Police Dept. spokesperson tells us the three main culprits in the brawl were all arrested.