Pakistan Muslim League Nawaz (PML-N) Joint Secretary Mian Taimur and his father were assassinated on Wednesday when his car was ambushed in Karachi.
According to a private TV channel, the incident took place when unknown gunmen opened fire on their car in Defense Phase VII killing Taimur and his father, Mian Arbab.
PML-N Sindh leaders Salmeem Zia and Nihal Hashmi have condemned the incident.
A large number of protesters were seen on the streets burning tyres near Kalapul area of the city while aerial firing was also heard in the adjacent areas.