French football league chief Frederic Thiriez warned Sunday that there would be repercussions from the crowd trouble that marred Saturday's match between St Etienne and Lyon.
The match, which champions and league leaders Lyon won 3-1, was stopped for 20 minutes after smoke bombs were thrown from the crowd.
The referee took the players off to the changing rooms while police responded by firing tear gas into the crowd.
"Faced with such behaviour, which is badly harming football, we will be unyielding in clamping down," said Thiriez.
He said disciplinary measures would be taken against those responsible and criminal prosecutions were possible too.
"On the disciplinary side the league's disciplinary commission has met, a report has been delivered and I hope it will be very firm (in its response)."
Lyon president Jean-Michel Aulas and his St Etienne counterpart Bernard Caiazzo are due to be called before the commission.
"On the criminal side there were some arrests, thanks to the video surveillance (at the ground), I have underlined it and I hope there will be some convictions and stadium bans," added Thiriez.
Three people arrested over the trouble at the Geoffroy-Guichard stadium were still being held in custody on Sunday, a judiciary source revealed.