Shahbaz Taseer, 33, was flown to Lahore from Quetta in a special aircraft from the restive Balochistan province on Tuesday.
Interior minister Nisar Ali Khan had set up a committee to probe the circumstances surrounding the freedom of Shahbaz, who was set free this week and several security agencies claimed their involvement in a "successful operation" to release him from kidnappers.
The report said it was not clear why the kidnappers set him free or if they were paid ransom. It said no one is allowed to use the issue to link it with their performance.
"Those involved in using it for personal advancement will be sternly warned," it said.
Shahbaz was kidnapped from the Gulberg area of Lahore from near his office on August 26, 2011 and since than it was feared he was held captive by different militant groups.
