Spanish police have confirmed a Paris Saint-Germain supporter was stabbed by hooded thugs near Barcelona's Camp Nou last night.
The victim was admitted to a nearby hospital where his condition has been described as serious, but not life threatening.
The attack took place on Felipe de Paz following Barcelona's Champions League victory over PSG, when two hooded individuals approached the victim from behind.
Police are investigating whether a second stabbing which took place when four hooded thugs approached someone on the nearby Avenida Madrid, is also football related. The victim of this second attack has been discharged from hospital
A statement from Barcelona's criminal investigation unit confirmed: "The police are working to determine the exact circumstances of the facts and to detain those responsible."
It comes less than two weeks after a Deportivo fan was killed following violent clashes outside Atletico Madrid's Vicente Calderon stadium.
Spanish side Valencia say they will ban the fan who hit Leo Messi with a bottle during their match with Barcelona on Sunday.
The Argentine forward was struck when celebrating Sergio Busquets' last-minute winner over Valencia at their Mestalla stadium.
"Valencia CF regret and condemn the isolated incident in the game against FC Barcelona, in which a small, uncapped bottle of water was thrown from the stands at opposition player Lionel Messi," Valencia said on their website.
"The club will endeavour to locate the person who threw the bottle and they will be banned for life from the Mestalla.
"Valencia CF operate a zero tolerance policy on such actions and rigorously enforce all security measures set out by legislation."
Watch the moment a bottle struck Lionel Messi on the head shortly at the end of Barcelona's 1-0 win against Valencia.Read the full story ›
Barcelona president Josep Maria Bartomeu says Leo Messi is happy at the Catalan club, claiming external bodies have been stirring up the rumours he wants to leave the Nou Camp.
The Argentine forward was recently quoted as saying he was open to the possibility of leaving, but Bartomeu has denied this.
"Leo is under a lot of pressure off the field," Bartomeu told 8TV. "I have spoken with his father, Jorge, two days ago and my impression is that nothing has changed, he is happy at Barca, and his comments say that clearly - he wants to win everything.
"He has not asked us for a new contract. No, no. He is happy. From inside the club we will always help the player. [Former Barca coach Pep] Guardiola already said it a few years ago, Leo must be happy at Barca."
Lionel Messi has hinted he could leave Barcelona next summer after admitting "sometimes things don’t work out" when quizzed about his future.
Speaking to Argentine newspaper Ole, he explained:
"Today I live in the present. I want to make a great year and win titles with Barcelona. And nothing more. After that we’ll see.
"Things can change a lot in football. While I have always said I would like to stay there [at Barcelona] forever, sometimes things don’t work out the way you would like."
Luis Suarez admits he has sought professional help in the hope he can cure his impulse to bite.
During the World Cup Giorgio Chiellini was his third on-pitch biting victim, seeing the Uruguayan banned four months.
The Barcelona striker, who is sent to make his club debut on Saturday against Real Madrid, told the Guardian: "I think all the bad things I have been through are in the past. I believe I am on the right path now, dealing with the people who can help me, the right kind of people."
“Everyone has different ways of defending themselves. In my case, the pressure and tension came out in that way. There are other players who react by breaking someone’s leg, or smashing someone’s nose across their face. What happened with Chiellini is seen as worse. I understand why biting is seen so badly.”
Carlo Ancelotti and Luis Enrique are putting the final touches to their sides ahead of El Clasico on Saturday.
Real Madrid and Barcelona will face off in one of the biggest games in world football at the Santiago Bernabeu.
There will be some added spice as Barcelona striker Luis Suarez is set to return from his latest ban in the game.
Madrid boss Ancelotti said in the build up to the game: "There isn't a game in world football with this quality on show."
The match will see the world's two best players Cristiano Ronaldo - who already has 20 goals to his name this season - and Leo Messi face each other once more.
Barcelona head coach Luis Enrique says striker Luis Suarez will make his debut for the club against arch rivals Real Madrid on Saturday.
The Uruguayan was banned from playing after biting Giorgio Chiellini in the World Cup, but is now available for his first game following his move from Liverpool in the summer.
"Today I cannot play this game. But he will have some minutes for sure, how many I cannot say," Enrique admitted.
"It is a big thing for him, to join up finally with the team, and get some minutes.”
Luis Suarez was in good spirits as he prepared for his competitive Barcelona debut against Real Madrid in La Liga this weekend.
The striker joked around with Neymar in training ahead of the season's first Clasico.
Luis Suarez has confessed he started crying after sealing a transfer to Barcelona earlier this year.
The Uruguayan was sold by Liverpool in July after receiving a four month ban from any football related activity for biting Italy's Giorgio Chiellini at the World Cup.
The 27 year-old, who is set to make his competitive debut for Barcelona against Real Madrid later this month, told TV3:
I felt I had ruined my career.
At first, I did not want anyone to know anything. I locked myself away with my family, but then I reflected on what I had done, I apologised and felt liberated.
By then discussions with Barca had begun, and when Pere [Guardiola, his agent] called me to tell me it was done, I began to cry, because of the situation I was living and the support that the club was offering me.
I felt happy about the commitment the club had shown me. But I was still afraid that the repercussions of the incident might halt the deal. I knew that could happen.