Prime Minister Manmohan Singh has said that Pakistan not doing enough to bring to book the perpetrators of the 26/11 Mumbai terror attacks.Dr Singh told this to a Private TV Channel CNN in an interview which was taken in New Delhi and aired minutes before the Prime Minister arrived in Washington on the first State Visit of the Obama Administration.<br/>Prime Minister said that he had discussed this matter with Pakistan's Prime Minister Yousuf Raza Gilani, when<br/>he met at Sharm al-Sheikh in Egypt. At that time, Yousuf Raza Gilani assured that Pakistan will do all that is possible to bring to justice the perpetrators of Mumbai massacre. But Pakistan has not done enough.<br/>Dr Manmohan Singh said Hafeez Saeed is roaming around freely. Maulana Azhar Masood and other terrorist elements also moving around freely in Pakistan.<br/>On border issue, Dr Singh made it clear that there can be no redrawing of border with Pakistan, but the two countries can work together to ensure to make it a frontier of peace.<br/>