After initially blaming fans, UEFA has apologised to supporters for the "frightening and distressing" chaos at the Champions League final.
"UEFA wishes to sincerely apologise to all spectators who had to experience or witness frightening and distressing events in the build-up to the UEFA Champions League final last Saturday", the organisation said in a statement.
"No football fan should be put in that situation, and it must not happen again."
Fans, including children, were tear-gassed, assaulted and harassed while trying to get into the final.
UEFA initially blamed the chaos and violence on fans arriving late, then blamed holders of fake tickets. French Interior Minister Gerald Darmanin said the tear gas was justified.
UEFA added on Friday an independent review had been comissioned to identify shortcomings and responsibilities of all entities - the clubs, federations, fans, security, stadium operator - involved in the organisation of the final.
"The review, led by Dr Tiago Brandao Rodrigues from Portugal, aims at understanding what happened in the buildup to the final, and determining what lessons should be learned to ensure there is no repeat of the actions and events of that day," UEFA said, promising to publish the full report.
While Liverpool fans were mainly affected and the club has been gathering evidence and demanding action, Real Madrid also wanted answers from UEFA for the disorder that left its fans "abandoned and defenseless."
"We call for answers and explanations in order to determine those responsible for leaving the fans abandoned and defenseless," Madrid said in a statement on Friday.
"Fans who in general terms showed exemplary conduct at all times."
Madrid, which won the final 1-0, said the occasion had quickly turned into a series of unfortunate events that caused a sense of outrage around the world as images showed supporters being "attacked, harassed, assaulted and robbed in violent fashion".
"Football has transmitted an image to the world which is far away from the values and goals which it should pursue," Madrid said.
"Our fans and supporters deserve a response and those responsible to be held accountable in order for events like these to be eradicated from football and sport in general."