"What is relevant is Pakistan's approaches to LeT and the way the Pakistani state takes on the LeT," Miliband said. "It is clear where the responsibility of the attack lies. Pakistan has a primary and fundamental responsibility to tackle the roots of this organisation.
"In this case, it is essential that those who have been arrested must be brought to justice and, if found guilty, need to be punished," Miliband replied when asked about the action Pakistan needs to take in the aftermath of the attacks.
Miliband also urged Islamabad to tackle LeT "frontally and politically," when asked about media reports that the banned Jamaat-ud-Dawa, a public front for LeT, had regrouped under a new name. British Prime Minister Gordon Brown previously blamed LeT for the November attacks in India's financial hub that killed 173 people, including 26 foreign nationals.
Indian Prime Minister Manmohan Singh recently said the attacks had the support of some official agencies in Pakistan and the country was using terrorism as an instrument of state policy. "I have said publicly that I do not believe that the attacks were directed by the Pakistani state and I think its important to restate that," Miliband said.
Mukherjee said India stressed the need for international pressure on Pakistan to act against the terrorist groups. "I hope on the material provided and evidence given, Pakistan will act and ensure that the perpetrators of the Mumbai attacks are brought to justice," Mukherjee said at the joint press conference.
Relations between the nuclear-armed neighbours have deteriorated since the attacks as New Delhi has blamed Pakistan for not taking action against anti-India terrorist outfits based in its territory. Pakistan admitted last week that the only surviving gunman, Ajmal Amir Qasab, was a Pakistani citizen. Indian authorities established a special court and appointed a judge and prosecutor to try Qasab.
However, Islamabad on Tuesday renewed its demand for a joint investigation into the Mumbai massacre amid hopes that India "will see merit in it." "Serious, sustained and pragmatic co-operation is the way forward," Pakistani Prime Minister Yousaf Raza Gilani said while making a policy statement in the country's National Assembly, or lower house of the bicameral parliament.
He said Pakistan's Ministry of Interior was processing the information formally provided by New Delhi last week about the Mumbai carnage, adding that the results would be shared with India "in due course of time." Meanwhile, Miliband was scheduled to meet Singh on Tuesday evening, and fly to Mumbai Thursday.
In a show of solidarity with India, the British foreign secretary will deliver a keynote address at the western city's Taj Hotel, which was ravaged by the attacks. Miliband is scheduled conclude his three-day India tour on Friday and travel to Islamabad, officials said.