The three Pakistan cricketers at the centre of match-fixing allegations have been released without charge by police.

Test captain Salman Butt and bowlers Mohammad Asif and Mohammad Aamer were all questioned separately by detectives at Kilburn police station in north-west London.

Speaking outside the station after they had left, their lawyer, Elizabeth Robertson, said they had attended voluntarily and at no time were they under arrest.

She said the men would continue to co-operate fully with police and the International Cricket Council (ICC), which has already charged them under their anti-corruption code and provisionally banned them from playing in any match.

The trio say they are innocent but have been charged with "various offences" under Article 2 of the ICC's anti-corruption code relating to alleged irregular behaviour during and in relation to the fourth Test between England and Pakistan.

In a statement released on behalf of the Pakistan Cricket Board (PCB) and the three men, Ms Robertson said: "Mohammad Amir, Mohammad Asif and Salman Butt of the Pakistan Cricket Team have today been questioned under caution by the Metropolitan Police.

"They voluntarily attended Kilburn police station to answer questions relating to allegations published by the News of the World.

"At no time were they placed under arrest. They were free to leave at any time, answered all the questions that were put to them and have been released without charge or conditions."

She urged for the players' right to a fair and proper hearing be respected, adding: "The PCB, together with the three players, will continue to co-operate fully with the Metropolitan Police and the ICC investigations, and look forward to a timely and satisfactory outcome.

"They will not be making any further comment at this time and we ask that you respect their wishes in that regard."