In a setback to US efforts to seek early release of its national Raymond Davis arrested for double murder, a Pakistani court on Thursday rejected his claim that he has diplomatic immunity and said it would go ahead with his trial. During the last hearing of the case, 37-year-old Davis, a suspected CIA contractor, had filed an application in which he insisted that he had immunity. Lawyers representing the families of the two men shot dead by Davis in Lahore in January and the prosecution counsel today presented their arguments during proceedings conducted behind closed doors at Kot Lakhpat Jail by Additional District and Sessions Judge Yousuf Aujla.After hearing the arguments of defence and prosecution lawyers, Judge Aujla said no authentic document had been presented by Davis or the Pakistan government to show that the American national had diplomatic immunity. The judge said a note provided by the US embassy was not sufficient to prove Davis' diplomatic status. He rejected Davis' application claiming diplomatic immunity and said the court has the jurisdiction to go aheadwith his trial. Davis was arrested in Lahore on January 27 after he shot and killed two armed men he claimed were trying to rob him.