Pakistan has a primary responsibility to act against those who carried out the Mumbai attacks, UK Foreign Secretary David Miliband has said.
Links could clearly be traced to Pakistan-based group Lashkar-e-Taiba, he said on his visit to India.
But Mr Miliband said he did not believe the attacks had been "directed by the Pakistani state".
During his trip Mr Miliband is expected to deliver a speech at the Taj Palace hotel, one of the Mumbai attack sites.
More than 170 people died when 10 gunmen attacked multiple locations in Mumbai (Bombay) on 26 November.
'Absolutely clear'
Mr Miliband was speaking in the Indian capital, Delhi, where he met Foreign Minister Pranab Mukherjee.
Mr Miliband said: "We are absolutely clear about the origin of the terrorist attack and the responsibility that exists in Pakistan to bring the perpetrators to justice."
But the foreign secretary said he believed that Pakistan was not directly involved.
"I have said publicly that I do not believe that the attacks were directed by the Pakistani state and I think it's important to restate that," Mr Miliband said.
"What is relevant is the approach of the Pakistani state to the LeT (Lashkar-e-Taiba) organisation and the way the Pakistani state takes on the menace of the LeT organisation," he added.
Mr Mukherjee said that in his talks with Mr Miliband, he had "stressed the need for concerted international pressure on Pakistan" to take action against those responsible for Mumbai.
Good wishes
India says all 10 gunmen were from Lashkar-e-Taiba. Relations with Pakistan have been put under severe strain.
Pakistan admitted last week that the only surviving gunman - Mohammed Ajmal Amir Qasab - was a Pakistani citizen.
Earlier this month, Indian Prime Minister Manmohan Singh said that because of the "sophistication and military precision of the attack it must have had the support of some official agencies in Pakistan".
Pakistan rejected Mr Singh's allegations and accused India of raising regional tension. Islamabad and Lashkar-e-Taiba have both denied any role.
Pakistani officials said on Tuesday that Mr Singh had extended good wishes to Pakistani President Asif Ali Zardari for the new year in a greetings card.
The card features a white dove, a universal symbol of peace, the officials said.
The card is believed to be the first exchange between Mr Singh and Mr Zardari since the Indian prime minister's comments on Pakistan's role.
^ Back to top | BBC Sport Home | BBC Homepage | Contact us | Help | ©
~RS~q~RS~~RS~z~RS~49~RS~)