He highlighted that Pakistan remained committed to support efforts for durable peace and stability in Afghanistan.
A delegation of U.S. senate headed by Senator John McCain has urged both India and Pakistan to settle the Kashmir dispute through dialogue, besides highlighting that peace could not be established in Afghanistan without Pakistan's assistance.
McCain, chairman of the Senate Armed Services Committee, met Sartaj Aziz, Pakistan's top foreign policy official, and also met army chief General Qamar Javed Bajwa.
McCain also said the countries' alliance is more crucial than ever before.
Prime Minister Nawaz Sharif Monday said as longstanding partners and strategic allies, a sustained and strong Pakistan-US partnership was essential to deal with the various challenges confronting the region and beyond.
He said the USA attached importance to its relations with Pakistan.
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.
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Dr. Nazir Bhatti said that security in any region can not prevail without revival of human rights and religious freedom while Pakistan government have failed to uphold human rights and religious freedom in its territory targeting Christian, Hindus and Ahmadiyya communities with blasphemy laws and other discriminatory laws.
"We will not have peace in the region without Pakistan", McCain, who was accompanied by senators Lindsey Graham, Elizabeth Warren, Sheldon Whitehouse and David Perdue, said later.
Aziz for his part vowed Pakistan remained committed to "constructive engagement" with the United States in the efforts to create a "stable and prosperous" Afghanistan.
Critics say Islamabad is not doing enough to crack down on militants such as the Taliban-affiliated Haqqani network.
"Pakistan has major importance for the U.S in South Asia".
"If the United States wants to honestly contribute in the war against terrorism, then it should strike terrorist safe havens and hideouts beyond the borders of Afghanistan", said MP Farooq Majro, referring to terror hideouts and safe havens in Pakistan.
The prime minister reiterated his government's commitment to improve relations with Afghanistan and India.