A Celtic fan has told how supporters have been locked inside St. Patrick's bar in Valencia by armed police.

The fan, who does not want to be named, said they have been told to stay inside the bar for "no reason" and has sent the Daily Record shocking footage of people being attacked if they try to go outside.

We reported earlier how footage showed fans and cops clashing on the streets ahead of the Hoops' Europa League second-leg match tomorrow evening.

Campaign account @FACKilltheBill posted a video on Twitter saying: "Some appalling footage appearing tonight showing Spanish police violently attacking supporters without provocation in Valencia.

"We urge all fans to stay safe, and if necessary to document any abuses, especially if arrests are made."

Now, the female fan reports scenes of "absolute chaos" in the city with the armed officers violently assaulting anyone who tries to leave the bar.

(Image: Daily Record)

Footage shows the armed officers patrolling the streets outside, while fans are forced to stay inside the boozer.

The fan said: "It's absolute chaos here. We're currently sitting with one guy who has a wound on the back of his head after being hit by the police."

But the fan insists the supporters weren't doing anything wrong and no one knows why the police are attacking them.

She continued: "One minute we were standing at the bar and the next minute people were shouting 'Get in!'.

"We tried to leave but they just starting hitting people with batons."

In shocking scenes, two cops can be seen violently attacking a man outside the bar with a large truncheon.

Watch: Celtic fans clash with cops in Spain

Moments later another fan in a burgundy top jumps in to try and help the man being attacked by police, only for three more armed cops to arrive and brutally try and diffuse the situation while a woman can be heard screaming for them to "leave him alone".

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The fan also said she was hit for taking video of the attacks.

She said: "One of them even hit me for filming. They hit me on the leg with their batons."

Thousands of Celtic fans have descended on the Spanish city for the clash following their 2-0 defeat on Thursday.

The Spanish Government's Anti-Violence Commission announced earlier this month they have deemed the game a "high risk" encounter, meaning there is likely to be a hugely increased police and security presence at the tie.