Voicing concern over the terror machine still remaining intact in Pakistan, Prime Minister Manmohan Singh has asked the leadership in Islamabad to 'now wake up' and stop jehadi groups operating from its soil to target India.

Sending a message to Pakistan in the wake of the Karachi attack, Singh has said its leadership should realise that the terror machine there was 'equally hurting' them and must take more effective action against the terror groups.

The Prime Minister told reporters on his way back from six-day visit to Ethiopia and Tanzania last night that terrorism as an instrument of state policy of Pakistan was 'simply not acceptable to people in the civilised world'.

He said India will use every possible opportunity to convince Pakistan about it.

"As Pakistan's neighbour, we have great worries about the terror machine that is still intact in Pakistan. We would like Pakistan to take much more effective action to curb the activities of those Jehadi groups which particularly target a country, like India," he said.

Apparently referring to the recent terror attack on Pakistan navy airbase in Karachi, he said: "The more I see of what is happening in Pakistan the more I am convinced that Pakistan's leadership must now wake up, and must recognise that the terror machine they have or at least some elements in the country patronise, is working not to anybody's advantage."

On 26/11 attacks probe in Pakistan, he said, "We must convince Pakistan that it is in their own interest that they must help us in tackling the problem of terror in our region.

"That those Jehadi groups that target India, as a destination for their terror, they must be effectively curbed and dealt with. That is an ongoing process and at every opportunity that we have, we should continue to impress on Pakistan."

Singh hoped Pakistan would 'recognise that this monster of terrorism which they unleashed at one time, is hurting them as much as it can hurt our country'.

Asked about the deposition of David Headley implicating ISI in the Mumbai attacks, Singh said, "it did not reveal anything new".

New Delhi for long has held that ISI has a direct role in the Mumbai attacks, a charge flatly denied by Pakistan.

The trial of David Headley has not brought out anything new that we did not know. The trial is still on," the Prime Minister said in his first comments after Headley's ongoing deposition in the US court.

"We will study it, when the trial is completed. It does not revealed anything fresh that we did not know before," he said. Singh said there was also global concern about terrorism and the world has seen, as never before that the epicentre of terror is in India's neighbourhood.

He said countries appreciate India's point and "it should be our effort to mobilise world opinion to ensure that this terror machinery which operates in our neighbourhood in Pakistan is brought under effective control." Asked about the recent terror strike on Mehran military base in Karachi, he said: "I have always maintained that a strong, stable and peaceful Pakistan is in the interest of our country.

Therefore, the events do worry us." Pakistan, Singh said, needs to be convinced that it is in their own interest that they must help India in tackling terror in the region.

To another question, Singh made it clear that a visit to Pakistan, which he has agreed in principle, is unlikely in the near future.

"I have not made up my mind on that," he said, adding, "I always believe that good relations between India and its neighbours are desirable and indeed essential for us in South Asia to realise our development ambition."