The arrested terror suspects have made sensational disclosures during interrogation, sources said.
Police had recently arrested four terrorists and a facilitator with suicide vests and sophisticated weapons from Lahore.
The arrested terrorists have been identified as Kashif, Doctor, Nabeel and Haider.
The sources have claimed that an arrested man Kashif was deputy to the mastermind of the bomb attack in Bali island of Indonesia. The mastermind of Bali attack, Umar Atiq, has already arrested.
The terrorists disclosed to the investigators that they had planned to target top political and military officials. They informed investigators that their four accomplices were also on their way to join them in Lahore.
They had also confessed their involvement in bomb blasts and targeted killings in Karachi.