While having no information on the guilt or innocence of the three men, identified respectively as Alexander Mitchell, William Sampson and Raaf Schifte, Amnesty International is concerned that the men reportedly have been held for long periods without consular access, without access to lawyers and may be at risk of torture.

There are also fears that televised 'confessions' may prejudice their chances of a fair trial.

Amnesty International UK Communications Director Richard Bunting said:

'Secrecy, torture and unfair trials are the hallmarks of Saudi justice. Foreign workers, especially from developing countries, are particularly vulnerable.

'TV confessions should form no part of a proper judicial process. Guilt or innocence can only be determined during a fair trial and not by parading people in front of television cameras.

'The Saudi authorities should ensure that all people in custody have immediate access to lawyers and are protected from torture.'