Pakistan has a "special responsibility" to act "urgently and transparently" in bringing to justice the perpetrators of Mumbai terror attacks, US Secretary of State Condoleezza Rice has said. "Islamabad has a special responsibility to act fast. I was assured that they will act, but the need is to act urgently and transparently," Rice said in a media availability in Copenhagen with the Danish Prime Minister Anders Fogh Rasmussen. "We did have a very good discussion on the situation prevailing in both the countries and I informed Prime Minister that this is a terrible and a sophisticated attack. It raises questions about the importance of making it certain that everything will be done to bring the perpetrators to justice, to prevent follow-on attacks," Rice said. She also said that Indian people who suffered a great loss are acting fast through their government to improve their capabilities on the counter-terrorism side. "...And the United States is going to be very active in helping them to do so," she said. Danish Prime Minister Rasmussen also said Rice briefed him about her recent visit to the region and stressed that the need of the hour is to stand united against the menace of terrorism. "...Secretary Rice informed me about her talks in the region. The attacks underline the continued need to stand together in the fight against terrorism," he said according to a transcript released by the State Department.