Pakistan has welcomed the leaders of Afghanistan and Iran for a regional summit at a key juncture in peace efforts with the Taliban and amid rising tensions between Tehran and Israel.
Afghan President Hamid Karzai arrived in Islamabad mid-morning, the Pakistani foreign ministry confirmed, for a series of talks with government and opposition figures on his second visit to the country in nine months.
Iranian leader Mahmoud Ahmadinejad was expected to arrive in the afternoon before formal summit talks on Friday, followed by a news conference.
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Karzai's office said his talks with Pakistani President Asif Ali Zardari and Prime Minister Yousuf Raza Gilani would focus on expanding relations, economic ties and "enhanced cooperation" on ending 10 years of war in Afghanistan.
Soon after his arrival, Karzai went into talks with Gilani, Pakistan's army chief General Ashfaq Kayani and senior government ministers, officials said.
Pakistan, the historic ally of the Taliban, says it will do anything required by Kabul to support an Afghan-led peace process, but there is a wide degree of scepticism in Afghanistan and the United States about its sincerity.
Pakistani Foreign Minister Hina Rabbani Khar visited Kabul this month on a fence-mending visit amid reports that Kabul and Islamabad felt isolated by contacts between the United States and the Taliban in the Gulf state of Qatar.
But in an interview published in the Wall Street Journal on Thursday, Karzai said the Afghan government was part of three-way peace efforts.
The Taliban have refused to talk to Karzai's US-backed government.
"There have been contacts between the US government and the Taliban, there have been contacts between the Afghan government and the Taliban, and there have been some contacts that we have made, all of us together, including the Taliban," Karzai was quoted as saying.
He did not mention any Pakistani involvement, but said cooperation from Islamabad "would make the whole matter easier".
Pakistan says the trilateral summit will focus on cooperation on counter-terrorism and transnational organised crime including drug and human trafficking, border management and trade issues.
Islamabad is moving towards a detente in its own relations with Washington, which took a drastic turn for the worse over last year's covert American raid that killed Osama bin Laden and air strikes that killed 24 Pakistani soldiers.
But despite strong US objections, Pakistan says it is pressing ahead with a multi-billion-dollar project to build a gas pipeline to import fuel from Iran.
"There is no change or shift regarding the gas pipeline project and it is scheduled to be completed by 2014," said the official.
Israel this week accused Iran of targeting its diplomats in Georgia, India and Thailand, against a backdrop of speculation that the Jewish state or the United States could be months from launching military strikes against Iran.
On Wednesday, Ahmadinejad unveiled new strides in Tehran's nuclear programme in a defiant blow to US and EU sanctions designed to rein in its atomic activities.
"I don't think so," a senior Pakistani government official told AFP when asked if mounting tensions between Iran and Israel, and the showdown over Iran's nuclear programme, would dominate the summit.
