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Thousands of Juve fans had crammed into San Carlo piazza, one of the Italian city's main public squares, to watch their team take on Real Madrid in the final in Cardiff on big screens.

But during the second half of the match, hundreds of people suddenly began to stampede out of the sqaure, after reportedly mistaking the bang of a firecracker for an explosion or gunshot.

Video posted online showed hundreds of people sprinting through the streets shouting and screaming, many wearing their team's famous black and white striped shirt.

Police lights can be seen flashing while the sound of fans calling each other can be heard.

Early reports suggested an 'explosion' had taken place in the square - but many Twitter users soon started saying the panic was a "false alarm".