A three-day Tableeghi Ijtema is beginning in Karachi on Thursday evening.
Tens of thousands of people are expected to attend the Ijtema that will be addressed by prominent religious scholars of Pakistan and other countries.
Tight security arrangements have been made for peaceful conduct of the congregation.
Sindh Home department has imposed ban on opening of shops, stalls and construction work in surrounding areas outside the boundary of Ijtehmagah from Thursday.