Leicester took control of their Europa League fate with a 3-1 win over Legia Warsaw on Thursday night, but the match was marred by crowd trouble at the King Power Stadium.
In the stands, Legia supporters were involved in a second-half battle with police as they attempted to reach Leicester fans, having already sparked several flares.
The wall of flares created a smokescreen around the ground.
At this point, around 100 supporters ripped down the netting dividing them and the home fans with police forced to intervene.
There were clashes between Legia fans and police, but they were ultimately unable to reach the home section.
In the game itself, the Foxes took the lead after just 11 minutes.
Harvey Barnes’ jinking run ended when the winger ran into a dead end but he got a lucky break and the ball ricochet through to Patson Daka on the edge of the area for the Zambian to expertly drill past Cezary Miszta.
It created history as Daka became the Foxes’ leading European goalscorer with his fifth goal of the competition.
Legia, who have slumped to second bottom of the Ekstraklasa after seven straight defeats, were compliant victims and Jjames Maddison added a second after 21 minutes.
The midfielder collected Ademola Lookman’s pass in the area and, after evading some lacklustre defending, fired in from 12 yards.
Yet Leicester’s tendency to self destruct this season threatened to derail them five minutes later when Wilfred Ndidi needlessly handled in the area.
Kasper Schmeichel saved Emreli’s penalty only for Mladenovic to covert the rebound – but it was just a blip for the Foxes who made the game safe before the break.
Seven minutes later Ndidi atoned for his error when he capitalised on some wretched Legia defending to glance in Maddison’s corner.
It was decisive and the Foxes played out the second half with a degree of comfort.