Police arrested the PML-N leader early Monday morning for violating the sanctity of the Quaid's mausoleum.
Mercury is expected to soar as high as 42 degrees centigrade.
Hours earlier, the government had imposed a month-long ban on pillion riding on the recommendation of the city's police chief.
CTD incharge says three people were involved in the attack, investigation underway.
Nepra says it will announce a decision later.
Factory administration says none of the workers are trapped in the rubble as most of them were out for prayers and lunch.
Police file FIR against owners and builders of collapsed building and neighbouring plot.
The 76-year-old scholar authored 28 books on various subjects, including Urdu ghazals and the events of Karbala.
"Apparently, this looks like a short circuit," says Deputy Commissioner South Irshad Ali Sodhar.
The blaze which erupted in the Shell Oil Depot at Keamari controlled after four hours; countrywide oil supply affected.
"The current exercise is against commercial establishments on encroached land," says Murtaza Wahab.
Thousands of policemen deployed for processions across the country, cell phone services remained suspended in some areas.
Many key roads in the city still flooded; Sindh govt declares all districts of Karachi and 14 others as calamity-affected.
Muharram 9 processions taken out nationwide amid strict security, partial suspension of cellular services
Thousands of security personnel deployed as processions appear in Karachi, Lahore, Peshawar and other cities.
PMD warns heavy rainfall "may further aggravate existing urban flooding/water logging in Karachi" and other cities.
Cellular services disrupted across the city; PM says he will visit Karachi next week.
Several major arteries witness severe traffic jams, power outages reported in many areas as rain continues for third day.
Chief minister declares rain emergency in province; says all low-lying areas in Karachi have been flooded.
Two people killed, four others injured in rain-related incidents.
Meeting of federal and Sindh governments' coordination committee decides to remove encroachments from drains.