New Delhi, Mar 31 : Prime Minister Manmohan Singh on Tuesday said that composite dialogue with Pakistan would only be possible if Islamabad shows visible results on the Mumbai terror attack probe.

Talking to reporters on the sidelines of Padma Awards function in Rashtrapati Bhawan before leaving for London to participate in the G-20 summit, Singh said, "They have to show visible results with regard to investigation in the 26/11 attack and that the government of Pakistan is doing everything possible to bring culprits to book."

Speaking about the recent terror attack on the Lahore police academy, which claimed the lives of at least 27 policemen, Singh said that India and Pakistan will have to fight together to eliminate the menace 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," he said.

Singh further informed that terrorism would be a "major issue" during his talks with US President Barack Obama, whom he will meet for the first time on the sidelines of the G-20 summit on Thursday.

Pakistan President Asif Ali Zardari on March 28 insisted to resume talks between Islamabad and New Delhi and said outstanding issues between the two countries like Kashmir should be settled peacefully.

Zardari had assured that the Pakistan People''s Party-led government is "fully cooperating to bring the criminals behind the Mumbai attacks to justice". (ANI)