Police at the Champions League final "went looking for conflict" and must be held accountable over what happened to fans, Liverpool's metro mayor has said.
Officers have been criticised for firing pepper spray and tear gas at Liverpool fans waiting to get into Stade de France in Paris on Saturday.
Steve Rotheram, who was at the game, said he was "outraged" by the "chaotic scenes" he witnessed.
He said lessons "have to be learned... but I won't hold my breath".
Mr Rotheram, a lifelong Liverpool fan, tweeted that he had "been quiet" since the final because he had his phone stolen by pickpockets near the stadium "like many others".