Dr. Dawood Ahmed Usmani, chief of ASWJ Malir District, was attacked near Malir District, police officials said.
However, Dr. Dawood Ahmed managed to survive, they said.
Two brothers became victim of firing of unknown assailants on a bike at Qasba Colony of Karachi, the port city of the country.
According to police, the brothers were the victims of two unknown riders who opened fire on them.
This is the fresh episode of killing in the metropolis as six people became victim of miscreants on Sunday.
The killings were made at a time when law enforcement agencies are getting prepared for the third phase of operation, started in Sep 2013.
Both of the brothers were targeted when they were leaving their home to reach their workplace, police officials said.
Qasba Colony is infamous for the lawlessness with many factions of political as well as extremists outfits are operating from the area.