Legia Warsaw fans displayed an evocative banner marking the 73rd anniversary of the Warsaw Uprising, prior to their Champions League clash with Astana on Wednesday night.
Fans displayed a large banner prior to kick-off on Wednesday night, which depicted a soldier with a gun to a child's head and the words: 'During the Warsaw Uprising Germans killed 160,000 people. Thousands of them were children'.
It was backed by fans in the home end holding up cards to form the white and red Polish flag, with '1944' embedded within it in black to mark the year of the uprising during the Second World War.
flag banner supplier-johnin
Legia Warsaw fans unveiled this provocative banner prior to Wednesday's game with Astana
The club also held a minute's silence prior to kick-off.
The uprising, which began on August 1, 1944, attempted to drive the advancing German army out of the city but ended in January 1945 after significant loss of life and with 85 per cent of Warsaw said to have been destroyed.
Legia won Wednesday night's match 1-0 but were still knocked out following the Khazakhstan champions' 3-1 victory in the first leg.
But while their Champions League participation is over for this season, they are almost certain to be investigated by UEFA following Wednesday night's crowd display.
It is not the first time Legia have used provocative banners, such as this aimed at UEFA
It is not the first time the club's displays have caused controversy, with a banner criticising UEFA and reading 'because football doesn't matter, money does' landing them a £63,000 fine after it was displayed in 2014.
The banner, surrounded by lit flares, showed a large pig imposed on a UEFA badge and was a response to being eliminated from that season's Champions League for fielding an ineligible player, against Celtic in a game they won 6-1.
The club were fined again in September 2016 due to a number of disturbances in their clash with Borussia Dortmund, which also led to them being forced to play Real Madrid behind closed doors after being handed a stadium ban.
Uefa's control, ethics and disciplinary body listed charges including crowd disturbances, setting off of fireworks and stairways blocked at the Polish side's home ground.