Arsenal have opened an investigation into “discriminatory and violent” behaviour by their supporters during the Carabao Cup defeat by Tottenham Hotspur at the Emirates on Wednesday night.

The Independent understands that at least one incident is under investigation, including an instance of antisemitic behaviour in which a supporter is alleged to have ‘hissed’ and chanted about ‘gassing Jews’.

Tottenham supporters have long been subject to antisemitic provocation due to the club’s historic links to the Jewish community, with hissing noises designed to invoke the sound of Second World War Holocaust gas chambers.

An estimated six million Jewish people were murdered in The Holocaust between the years 1941-1945.

Witnesses have told The Independent that in one incident, a supporter in the North Bank became involved in a physical altercation after fellow fans accused them of making numerous antisemitic references.

Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Show all 22 1 /22 Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Petr Cech Got forward well at times but his final ball was lacking in quality. The Arsenal goalkeeper couldn’t do a lot about Spurs’ goals but looks unlikely to displace Bernd Leno as first-choice goalkeeper anytime soon. Getty Images Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Ainsley Maitland-Niles - 6 out of 10 Back in a more familiar role tonight but he didn’t have the best of matches. Action Images via Reuters Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Sokratis Papastathopoulos - 5 out of 10 An average showing from Arsenal’s centre-back’s. AFP/Getty Images Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Granit Xhaka - 5 out of 10 Granit Xhaka is not a central defender. Booked late on after losing his cool with the linesman Action Images via Reuters Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Nacho Monreal - 6 out of 10 Got forward well at times but his final ball was lacking in quality. AFP/Getty Images Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Matteo Guendouzi - 7 out of 10 Didn’t do too much wrong. Was one of Arsenal’s better performers in the first half. Action Images via Reuters Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Lucas Torreira - 6 out of 10 One of Arsenal’s better performers but still not his best night. AP Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Henrikh Mkhitaryan - 5 out of 10 Missed a golden opportunity to put the Gunners in front in the first half. Getty Images Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Aaron Ramsey - 5 out of 10 The Arsenal fans were not happy with him when he failed to capitalise on some shaky goalkeeping from Paulo Gazzaniga. Action Images via Reuters Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Alex Iwobi - 7 out of 10 Was Arsenal’s best player in the first half. Was surprisingly substituted early in the second period. Action Images via Reuters Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Pierre-Emerick Aubameyang - 5 out of 10 Aubameyang had a very quiet night and was hardly involved in any of Arsenal’s attacking play in the first half. Action Images via Reuters Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Paulo Gazzaniga - 8 out of 10 Apart from a blocked clearance in the first half, Gazzaniga had a very good game and made some crucial saves in the first half. Action Images via Reuters Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Kieran Trippier - 7 out of 10 Recovered from an early knock and was a threat with his crosses into the Arsenal box. Action Images via Reuters Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Toby Alderweireld - 7 out of 10 Led the backline well. Arsenal struggled to break through Spurs’ defence all night. Getty Images Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Ben Davies - 7 out of 10 A good performance in a different position. Getty Images Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Danny Rose - 7 out of 10 Was good up against Maitland-Niles and Mkhitaryan in the first half. Action Images via Reuters Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Moussa Sissoko - 6 out of 10 Missed a huge chance to double Spurs’ lead in the first half but had another decent game in midfield. Action Images via Reuters Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Lucas Moura - 7 out of 10 Came off for Kane in the second half but troubled the Arsenal defenders when he was on the pitch. AP Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Dele Alli - 9 out of 10 Man of the match. His pass for Son’s goal was sublime, his finish for the second goal was even better. Top class. AFP/Getty Images Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Harry Winks - 7 out of 10 Calm and composed in the middle. Made things tick for Spurs. Getty Images Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Christian Eriksen - 7 out of 10 Always a threat with his set-pieces. Didn’t quite manage a goal but a class act. Action Images via Reuters Player Ratings: Arsenal vs Tottenham Carabao Cup quarter-final Son Heung-min - 8 out of 10 Son’s finishing off either foot is always excellent. Brilliant goal and led the line very well. Action Images via Reuters

Supporters say the offender was removed from the ground after complaints were made to stewards over their behaviour. Arsenal say they have no record of any such ejection but that a supporter left of their own volition after an altercation with a fellow fan.

The club are encouraging those with information to help identify the accused man to come forward.

In a statement released to The Independent, Arsenal said: “We are aware of the alleged incident and are currently investigating.

“We do not tolerate any anti-social, discriminatory or violent behaviour at Arsenal Football Club. Anyone identified will receive a lengthy club ban and their details will be passed to the Police to commence legal proceedings.

“We are continually reminding our fans if they witness any form of discriminatory chanting at a match, they can report it to a matchday steward or use our ‘See Something, Say Something’ service... this enables us to act as quickly as possible.”

The club are keen to stress that fans can report anti-social or discriminatory behaviour by texting “FOUL” to 67777 together with a description of the incident.

Tottenham won the match 2-0 (Getty)

The game, which Tottenham won 2-0, was pockmarked with several incidents of bad behaviour.

Mobile phone video footage shot from the away end appears to show a group of Arsenal supporters making several antisemitic provocations, with one Arsenal fan pictured spitting into the Tottenham section.

Another is clearly pictured pointing towards his nose, in an apparent reference to the offensive stereotype that Jewish people have large noses.

One video showed an Arsenal fan repeatedly gesturing towards his nose (WeAreTottenhamTV)

And midway through the second-half of the game, Tottenham midfielder Dele Alli was hit by a plastic bottle thrown by a Arsenal supporter as he went to retrieve the ball for a throw-in.

Arsenal commented on Thursday that they have identified a suspect after working with the Metropolitan Police. “We have all been embarrassed by the individual who threw a bottle at Dele Alli,” they said in a statement.

This incident comes all too soon after a Spurs fan was arrested for throwing a banana skin at Pierre Emerick-Aubameyang when the two teams met in the Premier League at the start of the month.

He was handed a four-year football banning order on Wednesday after pleading guilty to throwing a missile.

A banana skin was thrown at Aubameyang earlier this month (AFP/Getty)