Indian Home Minister Palaniappan Chidambaram said he would travel to Washington this week with evidence linking Pakistan to the deadly Mumbai attacks in which 163 people were killed, reports said Sunday. Chidambaram told newspapers in New Delhi he would take "overwhelming" and "unanswerable" proof to the United States for discussions with officials there. "The evidence leads to the conclusion that the plot was hatched in Pakistan and as the operation in Mumbai was on, it was masterminded and controlled from Pakistan," the Indian Express quoted Chidambaram as saying. He said the "detailed dossier" included telephone transcripts, communication intercepts and interrogation reports. The minister also challenged Pakistani President Asif Ali Zardari's claim that the 10 Mumbai gunmen were "stateless actors." "I presume they are state actors or state-assisted actors unless the contrary is proved," he said.