Chelsea barred three people from entering the stadium for their Europa League tie against Slavia Prague after footage emerged of abusive singing aimed at Mo Salah.
The video shows a group chanting that the Liverpool forward “is a bomber”.
Liverpool said the video showed "vile discriminatory chants" and was "dangerous and disturbing".
Three of the six people in the video were identified and barred. Chelsea are working to identify the other three, who did not turn up.