By Doina Chiacu
WASHINGTON (Reuters) - A senior Pakistani official urged the United States on Monday to ensure the U.S. military withdrawal from Afghanistan does not leave a vacuum that threatens regional stability and Pakistan's own security.
"Although the war in Afghanistan may be winding down, just as in the past, Pakistan will have to face the brunt of any instability that may engulf Afghanistan after 2014," said Sartaj Aziz, Pakistan's national security and foreign affairs adviser.
Aziz and U.S. Secretary of State John Kerry opened discussions that are part of a 'strategic dialogue,' which have sought to move bilateral relations beyond crisis-driven security concerns to cooperation on trade, energy and education.
The United States has long said that violence in its long war in Afghanistan has been driven in part by militants' ability to rest and resupply in western Pakistan. American ties with Pakistan have been further strained by U.S. drone strikes against militants in Pakistan.
Kerry paid tribute to the high price Pakistan has paid in fighting extremism.
"I think few have suffered more at the hands of terrorists and extremists than people in Pakistan," Kerry said.
With violence in Afghanistan continuing, including a January 17 suicide bombing that killed 21 civilians at a Kabul restaurant, the future of the U.S. and NATO presence in Afghanistan remains uncertain.
Unless the Obama administration can persuade Afghan President Hamid Karzai to sign a bilateral security pact with the United States, all 37,000 U.S. soldiers are due to leave Afghanistan at the end of the year.
Aziz said the United States should consider Pakistan's security when making its next moves in Afghanistan, something he said Washington did not do when withdrawing troops from Afghanistan in the early 1990s or returned after the attacks of September 11, 2001.
"We have to ensure that Afghanistan successfully transitions into a period of stability and that past mistakes are not repeated," Aziz said.
Kerry acknowledged those concerns and emphasized the importance of continued cooperation on fighting terrorism and on nuclear security.
"We recognize that Pakistan is a vital partner in supporting a secure Afghanistan," he said. "And we know how closely Pakistan's own security is linked to Afghanistan's success."
Both sides welcomed a move toward warmer relations signified by the strategic dialogue. They welcomed increased investment in trade and energy, with Kerry highlighting education and initiatives for the economic advancement of women in Pakistan.
"The resumption of this dialogue after a gap of three years symbolizes the inherent resilience and significance of this relationship," Aziz said.
(Reporting by Doina Chiacu; Editing by Stephen Powell)