Prime Minister Manmohan Singh [Images] on Tuesday made it clear that the composite dialogue with Pakistan would not be possible until Islamabad [Images] shows 'visible results' in connection to the investigation in the Mumbai terror attacks [Images].

"They have to show visible results, with regard to the investigation on 26/11, that the government of Pakistan is doing everything possible to bring the culprits to book," he said. Singh was responding to a question on Pakistan President Asif Ali Zardari's [Images] emphasis on the need for early resumption of the composite dialogue process.

The Prime Minister said that Islamabad should convince New Delhi [Images] about their 'sincerity and determination' to deal with the menace of terrorism. Speaking on the terror strike on a police training centre in Lahore [Images], Dr Singh said India and Pakistan will have to jointly face the scourge of terrorism.

"I sincerely wish that the government and the people of Pakistan will have the courage and resources to defeat the forces of terrorism," the Prime Minister said on the sidelines of presentation of Padma Awards at Rashtrapati Bhawan.

Singh, who will attend the G-20 summit in London [Images] on the international financial crisis, said terrorism will be a 'major issue' during his talks with United States President Barack Obama [Images], whom he will meet for the first time on the sidelines of the summit on Thursday.

He said all bilateral and regional issues, India's relations with its neighbours and the menace of terrorism will figure at the talks.