The United States today accused Pakistan of violating the Vienna Convention by detaining one of its diplomats, who is currently in police custody for shooting down two persons in Lahore last week.State Department spokesman P J Crowley told reporters in Washington that when the person was detained, he identified himself to police as a diplomat and repeatedly requested immunity under the Vienna Convention on Diplomatic Relations. Mr. Crowley further said that they have called for his immediate release. According to a statement issued by the US Embassy in Islamabad, the diplomat detained in Lahore is a member of the US Embassy's technical and administrative staff, and therefore he is entitled to full criminal immunity and cannot be lawfully arrested or detained in accordance with the convention.Meanwhile, a Pakistani court today barred the government from handing over the detained person to the US. Lahore High Court Chief Justice Ijaz Ahmed Chaudhry issued the order in response to a petition filed by lawyer Saeed Zafar, who had asked the court to direct the government not to hand over the American to the US.