US conveyed this to the Pakistani leadership which assured visiting Secretary of State John Kerry that there would be no distinction between the good and the bad terrorists.

"The proof is in the pudding, and I mean, it relies on kind of what actual operational steps are taken," a senior State Department official told reporters travelling with Kerry on his trip to Islamabad.

The official made the remarks when asked if the top Pakistani leadership gave any commitment to US on taking actions against terrorist outfits like the dreaded Haqqani network and Lashkar-e-Taiba.

Soon after his arrival in Islamabad from Ahmedabad yesterday, Kerry met Pakistan's National Security Advisor Sartaj Aziz and Prime Minister Nawaz Sharif among others.

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During the meetings, US officials said the Pakistani leadership asserted that they would make no distinction among terrorists.

"The rhetoric that we heard tonight and what we've heard over the course of the last months since the Peshawar attack was absolutely the case that this has unified the country in a way that they've repeatedly described as their 9/11, that it created a consensus in the country that had never been there in that same way," the official said.

The Pakistani leadership said they are not making any sort of distinction between terrorist groups.

"This is something that we've heard more uniformly, more robustly than we've ever heard," the official said on condition of anonymity.

"Do you believe it?" the senior state department official was asked. "I hope to believe it," the official said.

"We'll have to see kind of what develops, but I think that you can't deny that the North Waziristan operation has had some significant impacts which they have to continue to solidify and strengthen," the official said.

"They told us very, very explicitly, from both military and civilian leadership, that they were in this fight till the end. And we'll have to see, but if, in fact, they are doing that, that's a commitment we want to support," the official added.

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Another senior state department official described Pakistan's commitment to not differentiate between terrorists as a "forward-looking thing" which now simplifies US' dialogue with the country.

However, the official cautioned that, "we are going to have to watch and see how this plays out."

"The Pakistani delegation told us several times today they won't differentiate between good and bad Taliban, and there are two important things inherent to that kind of a statement. One is acknowledgement that there had been or was a policy of good Taliban and bad Taliban, which I think is interesting," the official said.

"But secondly, that's a measurable proposition going forward. They've now committed themselves to something that we can actually more easily observe and measure, because if there is no differentiation, then all Taliban and all militants should be within the spectre of their operations. That's something that makes it much easier for us to engage with them," the official said.

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The State Department official appreciated the steps taken by the Pakistan to ensure that LeT operations commander and Mumbai attack mastermind Zakiur Rehman Lakhvi is not granted bail by the court and remains behind bars.

"Look at what's happened with Lakhvi over the course of the last two weeks and the very strong position that the government has taken to make sure that he continues to be detained; the fact that Haqqanis have been disrupted. We have to see if it's permanent or not, and they've talked about how they have gone after the Haqqanis," the official said.

"But it's no secret that we continue to suggest that more has to be done on that in particular and that it's very important to us, as it should be important to Pakistan and is very important to Afghans," he said.

Taking about the Afghan Taliban, the official said a range of issues have been discussed with Pakistan, including on where Islamabad can provide support on reconciliation.

"So these are all very active strands of discussion. There's some progress that's out in the public domain, and we'll have to see what continues to develop over the course of the next few months," the official said.

In his meeting with Prime Minister Sharif, Kerry briefed him on his just-concluded trip to India and the talks that he had with the Indian leadership, the official said.

"The Secretary just came from India, he debriefed a little bit on the India trip as well, and we talked about other broader regional issues. In terms of bilateral issues, we talked about continued civilian assistance, security assistance, economic issues, market access. It really covered the waterfront," the official said.

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