The game was stopped just 15 minutes in as the barrier at the front of the away stand gave way from supporters celebrating Fode Ballo-Toure's goal by pressing forwards towards the players.
Lille's fans celebrated so hard that the stadium barrier collapses. Initial reports suggest - thankfully - that no one is seriously injured. pic.twitter.com/5WX9ifNDwC— Goal (@goal) September 30, 2017
Supporters landed on top of each other in a heap and security personnel took to the field to evacuate the area and attend to the wounded.
A crisis meeting between representatives of the two clubs as well as police and the stadium's security took place and it was decided that the game would resume at a later date as the situation grew more intense.
It was initially reported that no one had been seriously injured by the incident, but Ligue 1's organisers confirmed that at least three people had been seriously injured. It has now been confirmed that four people are in a serious condition.
"Safety is no longer assured," an official of the LFP said. "Three people were evacuated and are seriously injured while 17 others have minor injuries."
Amiens president Bernard Joannin spoke to the media at a hastily-arranged press conference after the incident, and pointed the finger of blame at a section of ultras behind the goal.
He said: "Football must be a celebration and the police warned us that 200 very angry ultras were in the section reserved for Lille fans and they launched themselves in a disorderly way - more than 500 people - on this barrier which was in perfect condition."