Ali Haider Gilani, son of ex-premier Gilani, has been recovered from Afghanistan's Ghazni province, Pakistan's Foreign Office said in a statement.
Six suspects, including two women, were arrested Thursday during an operation to trace the kidnapped son of former premier Yousuf Raza Gilani in Pakistan's restive northwest, officials said.
Haider's release was the second successful instance of a dramatic rescue in a high-profile kidnapping case after slain Punjab governor Salman Taseer's son Shahbaz, who was abducted in 2011, was found in March after spending nearly five years in captivity.
Police in Pakistan have busted an illegal telephone gateway exchange in Lahore, allegedly being operated by the Taliban to make ransom calls to families of persons kidnapped by them, including the sons of former premier Yusuf Raza Gilani and slain Punjab governor Salman Taseer.
Pakistani authorities claimed to have foiled a plot to target Prime Minister Nawaz Sharif by busting a terror network planning to launch suicide attack on his residence in Raiwind on the outskirts of Lahore.