Lookman’s goal proved to be the decisive factor in the game.
Ismaila Sarr put Crystal Palace ahead in the 41st minute.
The 25-year-old will join the Reds in a deal worth an initial £125 million, potentially rising to £130 million with add-ons.
The Premier League and the Football Association both described the incident as unacceptable.
Salah netted his 10th opening-day strike in the competition to spark wild celebrations.
They confirmed that the celebrations of over 60,000 fans created mini earthquakes powerful enough to be picked up by sensitive monitoring equipment.
In the 74th minute, Liverpool regained the lead thanks to Curtis Jones.
Two title-chasers, Arsenal and Liverpool, shared points, playing a 1-1 draw in the English Premier League on Saturday at Anfield.
Liverpool returned for the second half much stronger, doing more damage as the Red Devils completely lost control of the game.
Liverpool bounced back from last week’s defeat to Arsenal to hand Manchester City their first defeat this season at Anfield.
