Pakistani Prime Minister Nawaz Sharif plans to pay an official visit to Iran to discuss the latest developments in the region and exchange views over enhancement of all-out relations, a senior advisor announced. "The two countries will decide the date for the visit," Sharif's Special Advisor Sartaj Aziz told reporters on Wednesday. He noted that the Iranian and Pakistani governments are making the necessary preparations to finalize the date of the trip. Iran and Pakistan have exchanged delegations on a regular basis and the two neighboring countries are keen to expedite expansion of their bilateral trade ties.