Bringing the perpetrators of the Mumbai attacks to justice is an important task to finish for Pakistan, which also needs to look into the issue of Hafiz Saeed, accused by India of masterminding the terror strike, besides preventing cross-border infiltration, the US has said.

US Assistant Secretary of State for South and Central Asia Robert Blake noted that several accused have been nabbed and court cases begun against them, "but now it's important to finish the task, to complete those judicial proceedings".

Blake also said Pakistan should not in any way feel "threatened" by the strengthening of the Indo-US relationship.

"I think another important issue for Pakistan is to look at is the question of Hafiz Saeed, because Saeed is subject of international sanctions, UN sanctions, as well as bilateral American sanctions," Blake told reporters.

Blake said while Pakistan has deployed troops away from the Indian border lately, there was still room for progress on this issue, as also in preventing cross border infiltration.

"There's still some in Pakistan who believe that India is their primary threat, and not the extreme militant organisations," Blake told reporters.

On Pakistan's concerns over US' growing cosiness with India, Blake said: "I don't think Islamabad should in any way feel threatened by the steps that we're taking with India".

US officials have said Prime Minister Manmohan Singh's upcoming state visit to the US will help the two countries take their relationship to a new level.

Blake said it is ironic that during Obama administration's early days, Indians said that the US was focusing exclusively on Pakistan and Afghanistan to the exclusion of India.

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