Liverpool manager Jurgen Klopp joined Manchester United boss Erik ten Hag in calling for an end to tragedy chanting in March
The Hatters have launched an internal investigation after chants which indirectly referenced the Hillsborough disaster were heard during the match.
Luton "wholeheartedly" apologised to anyone offended by the chants, adding they are "extremely disappointed".
The FA is "seeking observations" from Luton and "further detail" from police.
-- Courtesy of BBC Sport