The army chief chaired a high-level briefing at Rangers Headquarters here in which he directed all commanders to focus on the entire network of terrorists, their abettors and financiers, and continue the clean-up in Karachi until peace is restored to the city.
"No stone would be left unturned to nab those behind the killing of Sabri," Sharif said.
His visit comes after the high-profile kidnapping of advocate Owais Shah, son of the Sindh High Court Chief Justice, and the targeted killing of Sabri who was gunned down last week by unidentified motorcyclists in an attack claimed by a splinter group of the Pakistani Taliban.
In other incidents, two well-known religious figures also came under attack in Karachi but escaped unhurt.
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The incidents raised serious questions over the efficiency of the Rangers-led operation since 2013 in Karachi.
Sharif was briefed in detail by Director General (DG) Rangers Major General Bilal Akbar on the paramilitary force's ongoing operation, the law and order situation and the way forward for Karachi during the meeting.
Official data also shows a sharp rise in crime recently indicating renewed activities of armed groups and individuals in the city despite ongoing Rangers-led operation.
Karachi, Pakistan's economic hub and biggest city, has for years been a hotbed for criminals, gangsters and militants who are involved in kidnapping for ransom, targeted killings, sectarian violence, terrorism and bank robberies.
Street crime remains one of the biggest problems here despite the paramilitary rangers and police carrying out a clean-up operation since September, 2013.