Indian Prime Minister Manmohan Singh met US President Barack Obama on Sunday, conveying his country's concerns over American military aid to Pakistan and over the situation in Afghanistan. Although the talks, held ahead of a two-day nuclear summit in Washington, focused on nuclear security, India's relations with Pakistan and Islamabad's growing stature in Afghanistan also figured, Indian officials said. Officials briefing the Indian media on the meeting said Mr Singh repeated India's request for the extradition of Pakistani-American suspect David Coleman Headley, who is accused of plotting the Mumbai terror attacks. India wants direct access to the suspect. They said President Barack Obama assured India that the USA was "engaging" Pakistan on the issue of trans-border terrorism and shares New Delhi's concerns over terror outfits plotting attacks on India's cities. He also expressed full support for India's request for access to David Coleman Headley, a key plotter of the Mumbai massacre who is currently in US custody, according to Indian foreign secretary Mrs Nirupama Rao. When Mr Obama spoke about reducing tensions between India and Pakistan, Dr Singh drew his attention to Islamabad's dilly-dallying over the prosecution of those involved in the Mumbai massacre. "Unfortunately, there was no will on the part of Pakistan to punish those responsible for the terrorist attacks in Mumbai," Mrs Rao quoted Dr Singh as telling Mr Obama. "This is where the partnership of India and US could make the difference," said Dr Singh. Mr Obama, according to Mrs Rao, told Dr Singh that India had the goodwill and the understanding of the USA in this regard. "Obama fully understood our concerns about LeT and other terrorist groups in Afghanistan and Pakistan" and said "the US is engaging Pakistan on these issues". The White House, however, in a brief statement on the talks merely said "they also discussed a number of regional and global issues, including counter-terrorism and non-proliferation" without naming either Pakistan or Mumbai terror attacks. The two leaders also discussed the situation in Afghanistan and their shared vision for a strong, stable, and prosperous South Asia, it said. "In this context, President Obama welcomed the humanitarian and development assistance that India continues to provide to Afghanistan," the White House said echoing Mrs Rao's assertion that there is no disconnect between New Delhi and Washington on India's role in Afghanistan. The meeting took place on the eve of the Nuclear Security Summit that aims at securing the world from loose bomb-making materials. Dr Singh and Mr Obama sat at the centre of Garden Room, flanked by their respective delegations. The eight-member Indian delegation included national security adviser Mr Shivshankar Menon, foreign secretary Mrs Nirupama Rao, India's Ambassador to the US Meera Shankar and senior officials of the external affairs ministry. The 11-member US delegation included secretary of state Mrs Hillary Clinton, National Security Advisor James Jones, Assistant Secretary of State for South Asia Robert Blake and senior officials.