LAHORE - Federal Interior Minister Rehman Malik has said the US has not so far asked Pakistan to give custody of Americans arrested from Sargodha, and if they receive any request in this regard, they would abide by the extradition treaty signed by the both countries. He made a brief statement to this effect to the media after appearing before the Lahore High Court on Tuesday. To a question, he said so far it could not be determined through the investigation report by the UN as to who was responsible for killing of Benazir. Responding to a question about the presidential protocol provided to former president Pervez Musharraf, he said it was the prerogative of UK government to give him such a protocol, and the Government of Pakistan has nothing to do with it. Malik maintained no one could be permitted to challenge the writ of the govt in any part of the country. He said the terrorists were committing incidents of terrorism to please their masters.