Rouhani, who arrived here on his maiden two-day visit, met Pakistani Prime Minister Nawaz Sharif and held talks on issues of mutual interest, an official statement said.
Pakistan and Iran have reaffirmed their resolve to enhance the level of bilateral cooperation in diverse fields, including trade, economy and energy, Sharif and Rouhani told reporters after their wide-ranging talks this evening.
Sharif said the two countries have decided to open two new border crossing points between the two countries to encourage trade and economic activities and facilitate people to people contacts, Radio Pakistan reported.
The visit has assumed significance after sanctions over Iran's controversial nuclear programme were lifted. The withdrawal of sanctions has opened new avenues for Iran to enhance its economic interaction with the rest of the world.
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Sharif noted that it was his third meeting with Rouhani, which reflected the warmth and depth of bilateral ties. He said they talked about issues relating to energy, gas and export of electricity, the report said.
He said they explored the possibility of having better connectivity between Pakistan's Gwadar port and Iranian port of Chahbahar.
The start of construction of multi-billion dollars Iran-Pakistan gas pipeline and import of 3,000 MW of electricity from Iran are on the agenda, a Pakistani official said.
"The two sides will also discuss modalities to increase trade to 5 billion dollars in the coming years," he said.
Apart from the economic cooperation, the two sides will discuss the regional security situation, with the emphasis on Saudi-led 34-nation coalition of Sunni countries to fight against terrorism, especially Islamic State.
The tensions between Iran and Saudi Arabia in the wake of execution of a Shiite cleric by Saudi is another important issue which will be discussed. Sharif has been playing a role to defuse the tension.
Officials said that the situation of Afghanistan will also be discussed.