Aziz said that the strategic partnership between Pakistan and the United States was "critical to achieve peace and stability in the region and beyond".
A five-member US delegation, headed by McCain, held talks with a Pakistani delegation led by the country's foreign affairs adviser Sartaj Aziz in Islamabad, said Pakistan's Foreign Ministry spokesman Nafees Zakaria. Other members of the USA delegation were Lindsey Graham, Sheldon Whitehouse, Elizabeth Warren and David Perdue.
Aziz also said that Pakistan was ready to strengthen and deepen its partnership with the U.S to counter emerging terrorism threats including the expanding footprint of Daesh in the region.
The delegation met to Adviser to the Prime Minister on Foreign Affairs Sartaj Aziz and other officials including Foreign Secretary Tehmina Janjua and discussed discussed different issues regarding security and bilateral cooperation.
Pakistan argues that it has done a great deal to help the U.S. in tracking down terrorists and points out that it has suffered hundreds of deaths in militants attacks in response to its crackdowns.
Kashmir, ruled in part by India and Pakistan and claimed in entirety by both, is a hot-button issue between the nuclear-armed neighbours, which have fought two of their three wars since independence from Britain over the territory.
The US senators also praised the economic turnaround, as manifested by investors' interest and confidence in Pakistan.
McCain, a former USA presidential candidate, said on July 2 during a visit to Islamabad that "we will not have peace in the region without Pakistan".
They reportedly held talks over regional security and collaboration between Pakistan and the U.S.
He expressed serious concern over the gross human rights violations and brutal repression of unarmed people in occupied Kashmir.
"Pakistan look forward to constructive engagement with the United States on all efforts and initiatives that would lead to a stable and prosperous Afghanistan", he said.
The adviser said that Pakistan remained committed to supporting efforts for lasting peace and stability in Afghanistan and noted that Quadrilateral Coordination Group process remained a credible and effective vehicle to facilitate reconciliation and restore peace, stability and economic prosperity in Afghanistan.