The US has been successful in winning Pakistan's support to curtail the Haqqani network, a Taliban faction blamed for a string of deadly attacks in Afghanistan, The Express Tribune newspaper reported on Wednesday quoting its sources.
Two senior unnamed security officials confirmed that the Pakistani military had decided to restrict the movement of all militant groups, including the Haqqani network, and deny them space within Pakistan's borders.
"We will play our part while coalition forces (in Afghanistan) will stop infiltration from across the border," said an unnamed Pakistani military official.
The officials refused to provide details of the plan.
The report said that the move, if confirmed, would be seen as a departure from the security establishment's years-old approach towards the Haqqanis.
The US has stepped up pressure on the Pakistani military to go after the Haqqanis, who have bases in the restive North Waziristan tribal region, in the aftermath of the May 2 raid that killed Osama bin Laden in Abbottabad.
The report said the change on Pakistan's part did not mean that the army will "directly confront" the Haqqani network, which Islamabad "believes will have a vital role in any future political dispensation" in Kabul.
Pakistan's new border security measures are believed to be the result of a deal that was struck during US Secretary of State Hillary Clinton's recent visit to Islamabad.
Under the agreement, the US is no longer asking for a full-scale military offensive against the Haqqani network in return for Pakistan's commitment to "take care" of the group by using means other than an operation.
This includes tightening border security to keep a check on the movement of the Haqqanis and persuading them to come to the negotiating table with the US.
Media reports from Washington have indicated that the Obama administration has adopted a new approach towards the Haqqanis.
The New York Times quoted a senior US official as saying that Clinton did not use her meeting in Islamabad to convince the Pakistani military to mount an offensive to root out the Haqqanis and other militants operating from sanctuaries in North Waziristan.
"Instead, the administration says, it is pressing the Pakistanis to provide intelligence on the Haqqanis, arrest some of the group's operatives and reduce ties to the terrorist group -- all steps well short of military action," the official said.
"We're at the point where Pakistanis have told us they're going to squeeze the Haqqani network."
Pakistan's chief military spokesman Maj Gen Athar Abbas did not confirm any specific plan to tackle militants but said Pakistan has a stated policy not to allow its territory to be used against any country, including Afghanistan.