External Affairs Minister S.M. Krishna has said that the Australian Government is duty bound to take action against those responsible for the stabbing of Indian youth Nitin Garg in Melbourne. He told media persons in Bangalore that such unfortunate incidents vitiate the atmosphere of trust, belief and cordiality in the relationship between the two countries. <br/>Talking to a TV Channel, Mr. Krishna said, issuing of an advisory to Indians in Australia will be the last resort. <br/>