WASHINGTON - Pakistan has shared with top US officials its military plans about the impending offensive in North Waziristan, a senior Pakistani official was quoted as saying in American media reports on Wednesday.

“It could be any day,” the official, who briefed reporters in Washington on condition of anonymity, said about the military operations that Washington has called for a long time.

The official said the plan to go on the offensive followed brutal Taliban attacks in recent weeks and the apparent failure of peace talks with the militants. Planning for the operation comes amid a Pakistan-requested pause in US drone strikes that is entering its third month — the longest period without such an attack in more than two years — and high-level bilateral meetings.

Pakistan’s Defence Secretary Asif Yasin Malik is heading a delegation of security officials in Washington. CIA Director John Brennan quietly visited Pakistan last week, days after General Lloyd J Austin, head of the US Central Command, held meetings at military headquarters in Rawalpindi.

With 150,000 troops already based in the tribal regions, the senior Pakistani official said the government is prepared to begin a full-fledged clearing operation, according to The Washington Post. “We really don’t have to start from scratch,” the official was quoted as saying.

He said an official evacuation had yet to begin but noted that tens of thousands of residents, who he said were “spooked” by reports of an imminent government attack, had left on their own.

US officials, while hailing the current level of cooperation and saying that they are encouraged by Pakistan’s apparent determination, noted that they have been frequently disappointed in the past, according to the Post. “We’ll believe it when we see it,” said one US official, who like other American and Pakistani officials spoke on the condition of anonymity to discuss diplomatic contacts and military plans.

“We’re not doing it for their happiness,” the senior Pakistani official said of the United States’ urging. Instead, he said, the execution last week of 23 Pakistani soldiers held by the Taliban since 2010, along with several recent attacks, including one that killed 19 at a Karachi police station, have turned public opinion against the militants and the sputtering peace talks. That has opened new political space for military action. The senior Pakistani official cautioned that the government has not formally declared the talks a failure and said that “it’s politically important for the government to take this to its logical conclusion.”

At least one round of talks had taken place, with no discernible results, when the execution of the Pakistani soldiers occurred. In recent days, the government has carried out several retaliatory airstrikes that resulted in the killing of dozens of militants in North Waziristan. He said the government targeting would “not discriminate” among the TTP, the Haqqani network and other militant groups in North Waziristan, including Al-Qaeda.

US officials have long attributed Pakistan’s reluctance to attack there to ties between its intelligence and Afghan groups, such as the Haqqani network, as well as Pakistan’s desire to keep its options open in Afghanistan, should US efforts there fail and the Afghan Taliban return to power, the Post said. Pakistan has repeatedly denied the charges and said it would take action that suited its own strategic priorities. Even as the United States and Afghanistan have accused Pakistan of failing to prevent Afghan and Al-Qaeda militants from crossing the border, Pakistan has accused US and Afghan forces of failing to go after TTP forces, many of whom fled to Afghanistan during previous Pakistani offensives.

Both the United States and Pakistan have touted the advantages of a hammer-and-anvil strategy, with coordinated operations along the border to stop fleeing militants in both directions. But as the two nations’ relationship has ebbed and flowed over the years, that level of cooperation has never come to pass.

Now, with the US withdrawal from Afghanistan well underway, the United States no longer has the military resources in eastern Afghanistan to adequately patrol the border, the senior Pakistani official said.