Union Minister Kiren Rijiju must resign because there is "audio proof" and other evidence that he facilitated a 450-crore scam embedded in a huge hydro-electric project in his home state of Arunachal Pradesh, the opposition Congress said today. Earlier this morning, Mr Rijiju, who is the junior Home Minister vociferously denied the charges, snapping "Those who are planting this news, if they come where we are, they will get hit with shoes. Is it corruption to try and help your people?" He also told NDTV that the Prime Minister's Office has not sought any explanation from him.