The incident occurred 15 minutes into the game after Fode Ballo-Toure had put Marcelo Bielsa's side ahead at the same end of the ground where the visiting supporters were situated.
Paris: At least three fans were seriously injured when a barrier collapsed at the front of a stand during a French soccer match.
Several fell about 1.5 metres and were crushed by other fans who dropped on top of them.
"We are giving them all our support".
"'Football should be a celebration and the police had warned us that 200 very worked-up ultras were in the stand reserved for Lille fans", Joanni said.
Lille supporters fall onto the field after midfielder Ibrahim Amadou scored against Amiens. "And they threw themselves in a disorderly fashion - more than 500 people - onto this barrier which was in a flawless state. imagine 500 people trying to get on the pitch".
"We are quite disturbed, we are counting on the LFP (the French league's governing body) so that the responsibilities are identified for the victims of this accident and so that this can't happen again".
The game has now been halted as injured fans are treated.
Joannin also apologised for his initial comments after the incident that seemed to blame Lille fans.
In a statement, Amiens said: "The club and all of its leaders wants to express solidarity with the injured Lille fans and their families, with their health paramount".