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Manchester City fans have been filmed destroying the toilets at Old Trafford during United's derby win on Wednesday night.

The supporters - heard chanting, "City, City, City" - are seen ripping sinks from the wall as they take out their frustration during

In the video, which appears to have been filmed on a mobile phone, several men launch kicks and stamps at the water basins, which smash on the ground.

Juan Mata scored the only goal to settle Jose Mourinho and Pep Guardiola's second meeting since both took jobs in the Premier League.

Emergency repairs are now being carried out at Old Trafford. As it was a cup game, City had more 7,500 fans at the match, two and a half times more than their normal allocation for a league fixture.

A United spokeswoman confirmed to the MEN that damage had been caused and said they would be repairing them in time for Saturdays’s home match with Burnley.

Police were fairly pleased, however, with the behaviour of most fans. There were just six arrests at the game three for being drunk and disorderly, one for racial abuse and one for public order offence.

And speaking afterwards, the match commander Chief Inspector Dean Howard said: “I’d like to thank everyone for their cooperation and support throughout the entirety of the match

In pictures: Man United 1-0 Man City

“Apart from a handful of arrests, the behaviour of the majority of the fans in attendance was excellent and everyone was able to enjoy the match in a safe environment.”

But footage that emerged after the game has cast a further shadow over football on a night when

Fans broke through segregation and launched projectiles during the EFL Cup tie, prompting further questions over the suitability of the Hammers' new ground to host high-risk football matches.

The FA and EFL have launched an investigation into that incident.

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Such trouble follows months of issues at West Ham and

that blighted the first Manchester derby of the season.

Supporters were recorded brawling in the streets after Guardiola's men

in mid-September.

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The images of the destruction at Old Trafford harked back to earlier this season when Rangers fans ripped apart the facilities at Celtic Park during the Old Firm derby.

As the Scottish champions

, Gers supporters were demolishing the roof and toilet cubicles in the away end at Parkhead.

(Image: Daily Record) (Image: Daily Record)

Then before the second Old Firm clash of the season last weekend, an 11-year-old boy was rushed to hospital after he was struck on the head with a bottle outside Hampden.

The young fan - who was supporting Rangers - is believed to have been walking along Aikenhead Road with his dad when he was he was injured, around 15 minutes before the League Cup semi-final kicked off.