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Josep Maria Bartomeu has been arrested by Spanish police for his involvement in the 'Barcagate' smear campaign scandal during his time as their club president.

Bartomeu is one of four people to have been arrested so far, with Barcelona's CEO Oscar Grau and head of legal services Roman Gomez Ponti two of those. Jaume Masferrer who acted as an adviser to Bartomeu is the other.

On Monday morning, Spanish police entered Barcelona's Nou Camp stadium in a search and seize operation.

Spanish media said the operation was related to last year's 'Barcagate,' in which club officials were accused of launching a smear campaign against current and former players who were critical of the club and then-president Bartomeu. 

Last September, it was reported that the Catalan police had filed a report to the judge investigating Barcelona's hiring of social media consultancy I3 Ventures and 'possible economic crimes' 

Barcelona's former president Josep Maria Bartomeu has been arrested by Spanish police

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The allegation, according to El Mundo, was that Barcelona paid up to 600 per cent above the going rate for the services of I3 Ventures who were employed to monitor Barcelona's social media.

It was claimed that these accounts ran negative stories about club figures who were in potential opposition to Bartomeu. One of the stories referred to Lionel Messi's wife Antonella.  

Back in July 2020, an investigation by audit company PricewaterhouseCoopers cleared Barcelona of any wrongdoing and ruled they did not commission I3 Ventures to run a smear campaign against important club figures.

At the time Barcelona insisted the audit cleared them of all wrong doing and issued a statement threatening to sue the media outlets who originally published accusations of foul play if they did not rectify.

The statement read: 'After months of having lived with defamatory accusations on this matter, Barcelona asks those media outlets who made the charges of improper behaviour against our organisation to proceed to rectify that information, given that it has no basis and has been denied by a report that has been put together with unlimited access to the information requested about the club and its executives.'

In September, Spanish publication El Mundo reported that Catalan police accused Barca of 'economic crimes' in hiring social media firm I3 Ventures

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But police have continued to investigate the matter and initially raided the club's offices at the iconic Nou Camp stadium last June as they sought vital evidence.

Police officials returned on Monday with reports revealing employees who work in the offices were asked to leave while officers searched for more evidence.

Speaking in February 2020, Barcelona admitted having hired I3Ventures but stringently denied that I3Ventures had any link to the social media accounts that have emitted the negative stories about Messi, Gerard Pique and Pep Guardiola among others.

The statement claimed all ties will be cut with the company if any links are proved too.

I3Ventures also issued a statement in which it said it was not true that they were the authors of various channels in social media - 'Justicia y dialogo en el deporte', 'Alter Sports', 'Jaume un film de terror', 'Respeto y deporte', 'Mes que un club' - behind the negative coverage of some of the club's biggest name.

Bartomeu and his board of directors resigned last year amid fallout from the controversy surrounding Messi.

The club has been mired in political turmoil and debt prompted by the coronavirus pandemic.

The operation comes less than a week before presidential elections are to be held at the club.