The government of Sindh has ordered law enforcement agencies "to ensure extreme vigilance" and take "special measures" to save Bilawal's life from Jundullah militant group, the Dawn reported.
The provincial government in what was intended as a confidential letter shared intelligence of a plan being made by the banned group to target the PPP chairperson.
However, the leaked letter did not state the details regarding the date, time, place and method of the attack.
Bilawal is scheduled to address a rally on October 18, the day when his mother and former prime minister Benazir Bhutto was attacked in twin blasts on Shahrah-i-Faisal.