Following a string of bombings and assassinations, calls are growing in Karachi, Pakistan's largest and richest city, for better security.
 
Local leaders say there is an international conspiracy to destabilise the city.
 
Amid rising tensions, army patrols have joined a beleagured police force on the streets of the edgy city.
 
Al Jazeera's Kamal Hyder reports.

Source: Al Jazeera