Kia Joorabchian on Wednesday night ramped up the pressure on West Ham by accusing the club of making misleading public statements over the Carlos Tevez affair.

Joorabchian, who is trying to negotiate Tevez's move to Manchester United, accused West Ham of failing to act upon "repeated promises and assurances" with regard to the player's future.

And he confirmed his intention to bring "the true circumstances" to the attention of both FIFA and the Football Association.

In a statement released to PA Sport by the businessman's lawyers, Joorabchian said: "Press statements both today and over last few weeks are wholly inconsistent with the real circumstances and the situation presented to us by West Ham concerning Carlos Tevez.

"We as a company have patiently kept away from the issues including West Ham in order to give the club the opportunity to resolve the matter in a legal and agreeable way acceptable to all parties.

"West Ham have consistently provided private assurances while at the same time making contrary statements to the public at large.

"We can no longer allow these inconsistencies to continue unaddressed.

"During his time at West Ham Carlos Tevez performed at a high standard. He was voted Hammer of the Year by the club's fans.

"There was a period at the end of last year when Carlos had the opportunity to leave the club and yet he decided to stay to successfully help West Ham survive in the Premier League.

"We wish to make clear that at all times it has been our intention to find an amicable solution and Carlos Tevez has, at no time, acted improperly in relation to his move to Manchester United Football Club as he was given permission via his representatives to talk to other clubs to reach an amicable agreement.

"Over the last six months West Ham have made repeated promises and assurances which they have not acted upon or performed. It is now time for these inconsistencies to be brought to an end.

"We see no alternative but to bring the true circumstances to the attention of a higher authority to aid a rapid conclusion to this issue."

It is understood those authorities are both the FA and FIFA.

FIFA have been called in to end the deadlock surrounding Tevez's move to Old Trafford.

Both West Ham and Manchester United believe only FIFA can break the impasse over the player's ownership, which has held up the proposed £30million-plus transfer.

Joorabchian, and his company MSI, claims to own Tevez's economic rights, while West Ham insist the striker is contracted and registered with them.

The Premier League have demanded West Ham must receive the bulk of the transfer fee if they are to sanction the move.

The league have now been asked to send the case to FIFA - a move welcomed by Joorabchian, who is ready to show documentary evidence he claims proves West Ham gave permission for the deal to go ahead.

FIFA will be asked for their dispute resolution panel or players' status committee to step in and decide whether Tevez is fully bound by his existing contract with West Ham or not.

Joorabchian's decision to adopt an aggressive stance over the issue is understood to have been prompted, in part at least, by reports which emanated from West Ham yesterday that the club had refused permission for Tevez to undergo a medical at Manchester United.

He was also anxious to ensure Tevez does not get painted as the villain of the piece by confirming the striker turned down moves away from Upton Park in January.

It is understood two leading European clubs were interested. One of those is believed to have been Juventus.

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