Others climbed the fences instead.Supporter Colm Lacey saw "children crying, people trapped" outside the entrances.
"People started jumping the queue, then they ripped the gate open and then there was a push," Lacey said.
Police officers with batons and riot shields ran from gate to gate to prevent pockets of fans forcing their way into the stadium without showing tickets. One policeman collapsed to the ground and had to be helped by other officers. Officers used tear gas on Liverpool fans on repeated occasions.
One Liverpool fan kissed his ticket and looked to the sky after finally getting through security.The scenes were reminiscent of the chaos outside Wembley Stadium before the European Championship final last year between England and Italy.
There were long lines of Liverpool fans still outside the stadium when there was 40 minutes to kickoff.
Then, about 15 minutes before the scheduled kickoff of 9 p.m. local time (1900 GMT), an announcement was made that there would be a delay, blaming the late arrival of fans to the stadium. It was greeted by jeers inside the stadium, given those fans had already endured long queues.The game eventually started at 9.37 p.m. local time.